Counties with highest COVID-19 infection rates in California

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July 1, 2022
Cbl62 // Wikicommons

Counties with highest COVID-19 infection rates in California

The vaccine deployment in December 2020 signaled a turning point in the COVID-19 pandemic. By the end of May 2021, 40% of the U.S. population was fully vaccinated. But as vaccination rates lagged over the summer, new surges of COVID-19 came, including Delta in the summer of 2021, and now the Omicron variant, which comprises the majority of cases in the U.S.

Researchers around the world have reported that Omicron is more transmissible than Delta, making breakthrough and repeat infections more likely.

The United States as of Jun. 29 reached over 1 million COVID-19-related deaths and 87.3 million COVID-19 cases, according to Johns Hopkins University. Currently, 66.9% of the population is fully vaccinated, and 47.3% of vaccinated people have received booster doses.

Stacker compiled a list of the counties with highest COVID-19 infection rates in California using data from the U.S. Department of Health & Human Services and vaccination data from Covid Act Now. Counties are ranked by the highest infection rate per 100,000 residents within the week leading up to Jun. 28, 2022. Cumulative cases per 100,000 served as a tiebreaker.

Keep reading to see whether your county ranks among the highest COVID-19 infection rates in your state.

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Chuck Abbe // Wikimedia Commons

#50. Inyo County, CA

- New cases per 100k in the past week: 200 (36 new cases, +6% change from previous week)
- Cumulative cases per 100k: 27,019 (4,874 total cases)
--- 6.6% more cases per 100k residents than California
- Cumulative deaths per 100k: 310 (56 total deaths)
--- 34.2% more deaths per 100k residents than California
- Population that is fully vaccinated: 63.4% (11,431 fully vaccinated)
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Canva

#49. Calaveras County, CA

- New cases per 100k in the past week: 224 (103 new cases, +49% change from previous week)
- Cumulative cases per 100k: 17,819 (8,180 total cases)
--- 29.7% less cases per 100k residents than California
- Cumulative deaths per 100k: 270 (124 total deaths)
--- 16.9% more deaths per 100k residents than California
- Population that is fully vaccinated: 54.1% (24,850 fully vaccinated)
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Chmee2 // Wikimedia Commons

#48. Siskiyou County, CA

- New cases per 100k in the past week: 237 (103 new cases, +1% change from previous week)
- Cumulative cases per 100k: 17,775 (7,739 total cases)
--- 29.8% less cases per 100k residents than California
- Cumulative deaths per 100k: 186 (81 total deaths)
--- 19.5% less deaths per 100k residents than California
- Population that is fully vaccinated: 49.5% (21,561 fully vaccinated)
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Kenneth Green // Wikimedia Commons

#47. Plumas County, CA

- New cases per 100k in the past week: 245 (46 new cases, +31% change from previous week)
- Cumulative cases per 100k: 19,354 (3,640 total cases)
--- 23.6% less cases per 100k residents than California
- Cumulative deaths per 100k: 69 (13 total deaths)
--- 70.1% less deaths per 100k residents than California
- Population that is fully vaccinated: 55.4% (10,427 fully vaccinated)
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Finetooth // Wikimedia Commons

#46. Lassen County, CA

- New cases per 100k in the past week: 245 (75 new cases, +21% change from previous week)
- Cumulative cases per 100k: 33,464 (10,231 total cases)
--- 32.1% more cases per 100k residents than California
- Cumulative deaths per 100k: 209 (64 total deaths)
--- 9.5% less deaths per 100k residents than California
- Population that is fully vaccinated: 29.2% (8,937 fully vaccinated)
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Doug Olson // Wikimedia Commons

#45. Placer County, CA

- New cases per 100k in the past week: 254 (1,012 new cases, +41% change from previous week)
- Cumulative cases per 100k: 19,342 (77,045 total cases)
--- 23.7% less cases per 100k residents than California
- Cumulative deaths per 100k: 158 (628 total deaths)
--- 31.6% less deaths per 100k residents than California
- Population that is fully vaccinated: 67.6% (269,143 fully vaccinated)
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Daniel Orth // Flickr

#44. Riverside County, CA

- New cases per 100k in the past week: 261 (6,450 new cases, +43% change from previous week)
- Cumulative cases per 100k: 26,573 (656,505 total cases)
--- 4.9% more cases per 100k residents than California
- Cumulative deaths per 100k: 263 (6,493 total deaths)
--- 13.9% more deaths per 100k residents than California
- Population that is fully vaccinated: 59.3% (1,466,147 fully vaccinated)
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Public Domain

#43. Stanislaus County, CA

- New cases per 100k in the past week: 265 (1,459 new cases, +21% change from previous week)
- Cumulative cases per 100k: 26,033 (143,356 total cases)
--- 2.8% more cases per 100k residents than California
- Cumulative deaths per 100k: 304 (1,672 total deaths)
--- 31.6% more deaths per 100k residents than California
- Population that is fully vaccinated: 57.7% (317,491 fully vaccinated)
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Frank Schulenburg // Wikimedia Commons

#42. Nevada County, CA

- New cases per 100k in the past week: 269 (268 new cases, +61% change from previous week)
- Cumulative cases per 100k: 18,803 (18,757 total cases)
--- 25.8% less cases per 100k residents than California
- Cumulative deaths per 100k: 129 (129 total deaths)
--- 44.2% less deaths per 100k residents than California
- Population that is fully vaccinated: 63.8% (63,665 fully vaccinated)
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DimiTalen // Wikimedia Commons

#41. El Dorado County, CA

- New cases per 100k in the past week: 272 (524 new cases, +74% change from previous week)
- Cumulative cases per 100k: 17,077 (32,932 total cases)
--- 32.6% less cases per 100k residents than California
- Cumulative deaths per 100k: 112 (216 total deaths)
--- 51.5% less deaths per 100k residents than California
- Population that is fully vaccinated: 61.4% (118,421 fully vaccinated)
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Ray Bouknight // Wikicommons

#40. Sutter County, CA

- New cases per 100k in the past week: 279 (271 new cases, +52% change from previous week)
- Cumulative cases per 100k: 24,812 (24,060 total cases)
--- 2.1% less cases per 100k residents than California
- Cumulative deaths per 100k: 234 (227 total deaths)
--- 1.3% more deaths per 100k residents than California
- Population that is fully vaccinated: 60.9% (59,012 fully vaccinated)
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Trance addict // Wikimedia Commons

#39. Glenn County, CA

- New cases per 100k in the past week: 282 (80 new cases, +116% change from previous week)
- Cumulative cases per 100k: 24,221 (6,877 total cases)
--- 4.4% less cases per 100k residents than California
- Cumulative deaths per 100k: 169 (48 total deaths)
--- 26.8% less deaths per 100k residents than California
- Population that is fully vaccinated: 55.7% (15,813 fully vaccinated)
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CFang // Wikimedia Commons

#38. Lake County, CA

- New cases per 100k in the past week: 287 (185 new cases, +39% change from previous week)
- Cumulative cases per 100k: 19,366 (12,469 total cases)
--- 23.6% less cases per 100k residents than California
- Cumulative deaths per 100k: 217 (140 total deaths)
--- 6.1% less deaths per 100k residents than California
- Population that is fully vaccinated: 55.6% (35,779 fully vaccinated)
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SD Dirk // Flickr

#37. San Diego County, CA

- New cases per 100k in the past week: 287 (9,584 new cases, -10% change from previous week)
- Cumulative cases per 100k: 26,452 (883,070 total cases)
--- 4.4% more cases per 100k residents than California
- Cumulative deaths per 100k: 160 (5,332 total deaths)
--- 30.7% less deaths per 100k residents than California
- Population that is fully vaccinated: 74.8% (2,498,708 fully vaccinated)
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Pixabay

#36. Santa Barbara County, CA

- New cases per 100k in the past week: 295 (1,315 new cases, +73% change from previous week)
- Cumulative cases per 100k: 22,278 (99,471 total cases)
--- 12.1% less cases per 100k residents than California
- Cumulative deaths per 100k: 157 (699 total deaths)
--- 32.0% less deaths per 100k residents than California
- Population that is fully vaccinated: 69.8% (311,819 fully vaccinated)
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Canva

#35. Butte County, CA

- New cases per 100k in the past week: 299 (655 new cases, +50% change from previous week)
- Cumulative cases per 100k: 19,563 (42,879 total cases)
--- 22.8% less cases per 100k residents than California
- Cumulative deaths per 100k: 198 (433 total deaths)
--- 14.3% less deaths per 100k residents than California
- Population that is fully vaccinated: 53.7% (117,601 fully vaccinated)
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Canva

#34. San Bernardino County, CA

- New cases per 100k in the past week: 300 (6,533 new cases, +37% change from previous week)
- Cumulative cases per 100k: 28,663 (624,874 total cases)
--- 13.1% more cases per 100k residents than California
- Cumulative deaths per 100k: 358 (7,803 total deaths)
--- 55.0% more deaths per 100k residents than California
- Population that is fully vaccinated: 57.4% (1,252,189 fully vaccinated)
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BDS2006 // Wikimedia

#33. Los Angeles County, CA

- New cases per 100k in the past week: 304 (30,517 new cases, -7% change from previous week)
- Cumulative cases per 100k: 30,681 (3,080,123 total cases)
--- 21.1% more cases per 100k residents than California
- Cumulative deaths per 100k: 319 (32,036 total deaths)
--- 38.1% more deaths per 100k residents than California
- Population that is fully vaccinated: 73.9% (7,417,697 fully vaccinated)
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Hollywood // Wikimedia Commons

#32. Orange County, CA

- New cases per 100k in the past week: 307 (9,755 new cases, +46% change from previous week)
- Cumulative cases per 100k: 20,313 (645,088 total cases)
--- 19.8% less cases per 100k residents than California
- Cumulative deaths per 100k: 223 (7,090 total deaths)
--- 3.5% less deaths per 100k residents than California
- Population that is fully vaccinated: 73.3% (2,326,936 fully vaccinated)
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U.S. Army Corps of Engineers Sacramento District // Wikimedia Commons

#31. Yuba County, CA

- New cases per 100k in the past week: 310 (244 new cases, +45% change from previous week)
- Cumulative cases per 100k: 23,467 (18,461 total cases)
--- 7.4% less cases per 100k residents than California
- Cumulative deaths per 100k: 158 (124 total deaths)
--- 31.6% less deaths per 100k residents than California
- Population that is fully vaccinated: 49.7% (39,106 fully vaccinated)
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LPS.1 // Wikicommons

#30. San Joaquin County, CA

- New cases per 100k in the past week: 310 (2,360 new cases, +38% change from previous week)
- Cumulative cases per 100k: 24,973 (190,331 total cases)
--- 1.4% less cases per 100k residents than California
- Cumulative deaths per 100k: 295 (2,252 total deaths)
--- 27.7% more deaths per 100k residents than California
- Population that is fully vaccinated: 62.5% (476,153 fully vaccinated)
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Canva

#29. Tulare County, CA

- New cases per 100k in the past week: 321 (1,496 new cases, +59% change from previous week)
- Cumulative cases per 100k: 30,520 (142,285 total cases)
--- 20.5% more cases per 100k residents than California
- Cumulative deaths per 100k: 321 (1,496 total deaths)
--- 39.0% more deaths per 100k residents than California
- Population that is fully vaccinated: 55.0% (256,409 fully vaccinated)
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Mark Miller // Wikimedia Commons

#28. Merced County, CA

- New cases per 100k in the past week: 326 (904 new cases, +73% change from previous week)
- Cumulative cases per 100k: 27,020 (75,030 total cases)
--- 6.6% more cases per 100k residents than California
- Cumulative deaths per 100k: 298 (828 total deaths)
--- 29.0% more deaths per 100k residents than California
- Population that is fully vaccinated: 52.7% (146,465 fully vaccinated)
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Canva

#27. Sacramento County, CA

- New cases per 100k in the past week: 327 (5,081 new cases, +24% change from previous week)
- Cumulative cases per 100k: 22,041 (342,091 total cases)
--- 13.0% less cases per 100k residents than California
- Cumulative deaths per 100k: 198 (3,077 total deaths)
--- 14.3% less deaths per 100k residents than California
- Population that is fully vaccinated: 68.3% (1,059,412 fully vaccinated)
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David Jordan // Wikicommons

#26. Fresno County, CA

- New cases per 100k in the past week: 331 (3,309 new cases, +50% change from previous week)
- Cumulative cases per 100k: 27,124 (270,995 total cases)
--- 7.1% more cases per 100k residents than California
- Cumulative deaths per 100k: 278 (2,777 total deaths)
--- 20.3% more deaths per 100k residents than California
- Population that is fully vaccinated: 61.7% (616,881 fully vaccinated)
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Kglavin // Wikimedia Commons

#25. Marin County, CA

- New cases per 100k in the past week: 334 (864 new cases, +5% change from previous week)
- Cumulative cases per 100k: 17,225 (44,583 total cases)
--- 32.0% less cases per 100k residents than California
- Cumulative deaths per 100k: 115 (297 total deaths)
--- 50.2% less deaths per 100k residents than California
- Population that is fully vaccinated: 88.1% (228,092 fully vaccinated)
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Canva

#24. Ventura County, CA

- New cases per 100k in the past week: 341 (2,884 new cases, +64% change from previous week)
- Cumulative cases per 100k: 23,507 (198,874 total cases)
--- 7.2% less cases per 100k residents than California
- Cumulative deaths per 100k: 179 (1,514 total deaths)
--- 22.5% less deaths per 100k residents than California
- Population that is fully vaccinated: 72.7% (615,302 fully vaccinated)
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nickchapman // Wikicommons

#23. Kern County, CA

- New cases per 100k in the past week: 347 (3,121 new cases, +73% change from previous week)
- Cumulative cases per 100k: 27,866 (250,849 total cases)
--- 10.0% more cases per 100k residents than California
- Cumulative deaths per 100k: 260 (2,344 total deaths)
--- 12.6% more deaths per 100k residents than California
- Population that is fully vaccinated: 54.1% (487,236 fully vaccinated)
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Binksternet // Wikimedia Commons

#22. Mendocino County, CA

- New cases per 100k in the past week: 352 (305 new cases, +31% change from previous week)
- Cumulative cases per 100k: 20,725 (17,979 total cases)
--- 18.2% less cases per 100k residents than California
- Cumulative deaths per 100k: 146 (127 total deaths)
--- 36.8% less deaths per 100k residents than California
- Population that is fully vaccinated: 69.3% (60,147 fully vaccinated)
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Stan Shebs // Wikicommons

#21. Napa County, CA

- New cases per 100k in the past week: 356 (491 new cases, +13% change from previous week)
- Cumulative cases per 100k: 22,007 (30,314 total cases)
--- 13.1% less cases per 100k residents than California
- Cumulative deaths per 100k: 105 (144 total deaths)
--- 54.5% less deaths per 100k residents than California
- Population that is fully vaccinated: 79.7% (109,724 fully vaccinated)
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Basar // Wikicommons

#20. San Luis Obispo County, CA

- New cases per 100k in the past week: 361 (1,023 new cases, +17% change from previous week)
- Cumulative cases per 100k: 22,227 (62,926 total cases)
--- 12.3% less cases per 100k residents than California
- Cumulative deaths per 100k: 171 (485 total deaths)
--- 26.0% less deaths per 100k residents than California
- Population that is fully vaccinated: 64.7% (183,288 fully vaccinated)
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Armona // Wikicommons

#19. Kings County, CA

- New cases per 100k in the past week: 374 (572 new cases, +96% change from previous week)
- Cumulative cases per 100k: 37,645 (57,575 total cases)
--- 48.6% more cases per 100k residents than California
- Cumulative deaths per 100k: 293 (448 total deaths)
--- 26.8% more deaths per 100k residents than California
- Population that is fully vaccinated: 45.6% (69,736 fully vaccinated)
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Naotake Murayama // Wikicommons

#18. Monterey County, CA

- New cases per 100k in the past week: 384 (1,666 new cases, +50% change from previous week)
- Cumulative cases per 100k: 23,553 (102,236 total cases)
--- 7.0% less cases per 100k residents than California
- Cumulative deaths per 100k: 171 (743 total deaths)
--- 26.0% less deaths per 100k residents than California
- Population that is fully vaccinated: 73.6% (319,606 fully vaccinated)
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Fred Hsu // Wikicommons

#17. Sonoma County, CA

- New cases per 100k in the past week: 386 (1,908 new cases, +54% change from previous week)
- Cumulative cases per 100k: 20,265 (100,175 total cases)
--- 20.0% less cases per 100k residents than California
- Cumulative deaths per 100k: 100 (493 total deaths)
--- 56.7% less deaths per 100k residents than California
- Population that is fully vaccinated: 79.2% (391,655 fully vaccinated)
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Jennifer Williams // Wikimedia Commons

#16. Alameda County, CA

- New cases per 100k in the past week: 400 (6,682 new cases, +58% change from previous week)
- Cumulative cases per 100k: 19,113 (319,438 total cases)
--- 24.6% less cases per 100k residents than California
- Cumulative deaths per 100k: 113 (1,891 total deaths)
--- 51.1% less deaths per 100k residents than California
- Population that is fully vaccinated: 82.3% (1,376,175 fully vaccinated)
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Public Domain

#15. Madera County, CA

- New cases per 100k in the past week: 413 (650 new cases, +94% change from previous week)
- Cumulative cases per 100k: 29,237 (45,997 total cases)
--- 15.4% more cases per 100k residents than California
- Cumulative deaths per 100k: 236 (372 total deaths)
--- 2.2% more deaths per 100k residents than California
- Population that is fully vaccinated: 55.0% (86,578 fully vaccinated)
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Canva

#14. Solano County, CA

- New cases per 100k in the past week: 416 (1,863 new cases, +51% change from previous week)
- Cumulative cases per 100k: 22,065 (98,771 total cases)
--- 12.9% less cases per 100k residents than California
- Cumulative deaths per 100k: 102 (455 total deaths)
--- 55.8% less deaths per 100k residents than California
- Population that is fully vaccinated: 68.0% (304,414 fully vaccinated)
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Epolk // Wikimedia Commons

#13. Yolo County, CA

- New cases per 100k in the past week: 417 (919 new cases, -9% change from previous week)
- Cumulative cases per 100k: 20,728 (45,706 total cases)
--- 18.2% less cases per 100k residents than California
- Cumulative deaths per 100k: 146 (323 total deaths)
--- 36.8% less deaths per 100k residents than California
- Population that is fully vaccinated: 71.1% (156,764 fully vaccinated)
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MARELBU // Wikimedia Commons

#12. Contra Costa County, CA

- New cases per 100k in the past week: 419 (4,832 new cases, +54% change from previous week)
- Cumulative cases per 100k: 20,334 (234,557 total cases)
--- 19.7% less cases per 100k residents than California
- Cumulative deaths per 100k: 116 (1,335 total deaths)
--- 49.8% less deaths per 100k residents than California
- Population that is fully vaccinated: 82.9% (956,015 fully vaccinated)
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EPoelzl // Wikimedia Commons

#11. Mariposa County, CA

- New cases per 100k in the past week: 424 (73 new cases, +74% change from previous week)
- Cumulative cases per 100k: 17,264 (2,970 total cases)
--- 31.9% less cases per 100k residents than California
- Cumulative deaths per 100k: 174 (30 total deaths)
--- 24.7% less deaths per 100k residents than California
- Population that is fully vaccinated: 46.3% (7,972 fully vaccinated)
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Canva

#10. Del Norte County, CA

- New cases per 100k in the past week: 424 (118 new cases, +79% change from previous week)
- Cumulative cases per 100k: 24,141 (6,714 total cases)
--- 4.7% less cases per 100k residents than California
- Cumulative deaths per 100k: 187 (52 total deaths)
--- 19.0% less deaths per 100k residents than California
- Population that is fully vaccinated: 48.4% (13,455 fully vaccinated)
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Aaronbrick // Wikicommons

#9. Santa Cruz County, CA

- New cases per 100k in the past week: 426 (1,163 new cases, +54% change from previous week)
- Cumulative cases per 100k: 21,085 (57,606 total cases)
--- 16.8% less cases per 100k residents than California
- Cumulative deaths per 100k: 97 (265 total deaths)
--- 58.0% less deaths per 100k residents than California
- Population that is fully vaccinated: 76.0% (207,598 fully vaccinated)
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Bobak Ha'Eri // Wikimedia Commons

#8. Tuolumne County, CA

- New cases per 100k in the past week: 442 (241 new cases, +80% change from previous week)
- Cumulative cases per 100k: 26,376 (14,369 total cases)
--- 4.1% more cases per 100k residents than California
- Cumulative deaths per 100k: 347 (189 total deaths)
--- 50.2% more deaths per 100k residents than California
- Population that is fully vaccinated: 53.0% (28,891 fully vaccinated)
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Canva

#7. San Francisco County, CA

- New cases per 100k in the past week: 448 (3,951 new cases, +39% change from previous week)
- Cumulative cases per 100k: 18,827 (165,966 total cases)
--- 25.7% less cases per 100k residents than California
- Cumulative deaths per 100k: 102 (899 total deaths)
--- 55.8% less deaths per 100k residents than California
- Population that is fully vaccinated: 84.2% (741,941 fully vaccinated)
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Craig Howell // Wikimedia Commons

#6. San Mateo County, CA

- New cases per 100k in the past week: 448 (3,432 new cases, +46% change from previous week)
- Cumulative cases per 100k: 20,388 (156,290 total cases)
--- 19.5% less cases per 100k residents than California
- Cumulative deaths per 100k: 94 (723 total deaths)
--- 59.3% less deaths per 100k residents than California
- Population that is fully vaccinated: 85.1% (652,698 fully vaccinated)
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Uladzik Kryhin // Shutterstock

#5. Santa Clara County, CA

- New cases per 100k in the past week: 452 (8,710 new cases, +42% change from previous week)
- Cumulative cases per 100k: 20,239 (390,174 total cases)
--- 20.1% less cases per 100k residents than California
- Cumulative deaths per 100k: 121 (2,338 total deaths)
--- 47.6% less deaths per 100k residents than California
- Population that is fully vaccinated: 86.1% (1,660,392 fully vaccinated)
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Cory Maylett // Wikimedia Commons

#4. Humboldt County, CA

- New cases per 100k in the past week: 457 (619 new cases, +124% change from previous week)
- Cumulative cases per 100k: 17,052 (23,116 total cases)
--- 32.7% less cases per 100k residents than California
- Cumulative deaths per 100k: 110 (149 total deaths)
--- 52.4% less deaths per 100k residents than California
- Population that is fully vaccinated: 66.8% (90,593 fully vaccinated)
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Michael Patrick // Wikimedia Commons

#3. San Benito County, CA

- New cases per 100k in the past week: 460 (289 new cases, +70% change from previous week)
- Cumulative cases per 100k: 23,685 (14,876 total cases)
--- 6.5% less cases per 100k residents than California
- Cumulative deaths per 100k: 158 (99 total deaths)
--- 31.6% less deaths per 100k residents than California
- Population that is fully vaccinated: 73.1% (45,900 fully vaccinated)
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Bobak Ha'Eri // Wikimedia Commons

#2. Amador County, CA

- New cases per 100k in the past week: 475 (189 new cases, +50% change from previous week)
- Cumulative cases per 100k: 24,844 (9,876 total cases)
--- 1.9% less cases per 100k residents than California
- Cumulative deaths per 100k: 219 (87 total deaths)
--- 5.2% less deaths per 100k residents than California
- Population that is fully vaccinated: 53.2% (21,157 fully vaccinated)
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Cbl62 // Wikicommons

#1. Imperial County, CA

- New cases per 100k in the past week: 537 (974 new cases, +118% change from previous week)
- Cumulative cases per 100k: 38,545 (69,850 total cases)
--- 52.1% more cases per 100k residents than California
- Cumulative deaths per 100k: 521 (944 total deaths)
--- 125.5% more deaths per 100k residents than California
- Population that is fully vaccinated: 95.0% (175,143 fully vaccinated)

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