Counties with highest COVID-19 infection rates in Colorado
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 Nov. 16 reached over 1 million COVID-19-related deaths and 98.1 million COVID-19 cases, according to Johns Hopkins University. Currently, 68.6% of the population is fully vaccinated, and 10.1% of vaccinated people have received the most recently available bivalent booster doses.
Stacker compiled a list of the counties with highest COVID-19 infection rates in Colorado 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 Nov. 10, 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.
#50. Crowley County, CO
- Cumulative cases per 100k: 57,631 (3,493 total cases)
--- 97.1% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 511 (31 total deaths)
--- 118.4% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 22.2% (1,346 fully vaccinated)
#49. Clear Creek County, CO
- Cumulative cases per 100k: 19,258 (1,868 total cases)
--- 34.1% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 134 (13 total deaths)
--- 42.7% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 50.6% (4,909 fully vaccinated)
#48. Cheyenne County, CO
- Cumulative cases per 100k: 20,317 (372 total cases)
--- 30.5% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 655 (12 total deaths)
--- 179.9% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 34.4% (630 fully vaccinated)
#47. Teller County, CO
- Cumulative cases per 100k: 22,601 (5,738 total cases)
--- 22.7% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 240 (61 total deaths)
--- 2.6% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 55.7% (14,134 fully vaccinated)
#46. Yuma County, CO
- Cumulative cases per 100k: 22,108 (2,215 total cases)
--- 24.4% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 269 (27 total deaths)
--- 15.0% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 45.1% (4,522 fully vaccinated)
#45. San Miguel County, CO
- Cumulative cases per 100k: 32,045 (2,621 total cases)
--- 9.6% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 98 (8 total deaths)
--- 58.1% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 86.0% (7,031 fully vaccinated)
#44. Garfield County, CO
- Cumulative cases per 100k: 28,879 (17,345 total cases)
--- 1.2% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 170 (102 total deaths)
--- 27.4% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 66.4% (39,871 fully vaccinated)
#43. Delta County, CO
- Cumulative cases per 100k: 22,203 (6,919 total cases)
--- 24.1% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 485 (151 total deaths)
--- 107.3% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 49.0% (15,276 fully vaccinated)
#42. Morgan County, CO
- Cumulative cases per 100k: 22,516 (6,545 total cases)
--- 23.0% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 485 (141 total deaths)
--- 107.3% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 49.6% (14,430 fully vaccinated)
#41. Pitkin County, CO
- Cumulative cases per 100k: 44,222 (7,857 total cases)
--- 51.2% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 45 (8 total deaths)
--- 80.8% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 86.3% (15,329 fully vaccinated)
#40. Grand County, CO
- Cumulative cases per 100k: 24,914 (3,920 total cases)
--- 14.8% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 191 (30 total deaths)
--- 18.4% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 64.9% (10,205 fully vaccinated)
#39. Rio Grande County, CO
- Cumulative cases per 100k: 30,585 (3,446 total cases)
--- 4.6% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 408 (46 total deaths)
--- 74.4% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 65.3% (7,357 fully vaccinated)
#38. Gunnison County, CO
- Cumulative cases per 100k: 22,077 (3,855 total cases)
--- 24.5% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 86 (15 total deaths)
--- 63.2% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 71.3% (12,444 fully vaccinated)
#37. Douglas County, CO
- Cumulative cases per 100k: 27,653 (97,106 total cases)
--- 5.4% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 135 (475 total deaths)
--- 42.3% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 76.0% (267,031 fully vaccinated)
#36. Arapahoe County, CO
- Cumulative cases per 100k: 28,708 (188,495 total cases)
--- 1.8% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 198 (1,297 total deaths)
--- 15.4% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 70.7% (464,117 fully vaccinated)
#35. Routt County, CO
- Cumulative cases per 100k: 29,593 (7,587 total cases)
--- 1.2% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 129 (33 total deaths)
--- 44.9% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 78.4% (20,089 fully vaccinated)
#34. Summit County, CO
- Cumulative cases per 100k: 37,700 (11,691 total cases)
--- 28.9% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 48 (15 total deaths)
--- 79.5% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 87.3% (27,060 fully vaccinated)
#33. Denver County, CO
- Cumulative cases per 100k: 29,487 (214,433 total cases)
--- 0.8% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 200 (1,453 total deaths)
--- 14.5% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 79.1% (575,000 fully vaccinated)
#32. Boulder County, CO
- Cumulative cases per 100k: 26,571 (86,675 total cases)
--- 9.1% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 125 (409 total deaths)
--- 46.6% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 81.6% (266,177 fully vaccinated)
#31. Adams County, CO
- Cumulative cases per 100k: 30,833 (159,538 total cases)
--- 5.4% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 270 (1,399 total deaths)
--- 15.4% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 70.8% (366,178 fully vaccinated)
#30. Jefferson County, CO
- Cumulative cases per 100k: 26,477 (154,330 total cases)
--- 9.4% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 252 (1,468 total deaths)
--- 7.7% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 80.1% (467,168 fully vaccinated)
#29. Ouray County, CO
- Cumulative cases per 100k: 21,668 (1,073 total cases)
--- 25.9% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 121 (6 total deaths)
--- 48.3% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 69.1% (3,424 fully vaccinated)
#28. Montrose County, CO
- Cumulative cases per 100k: 25,188 (10,770 total cases)
--- 13.9% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 409 (175 total deaths)
--- 74.8% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 50.9% (21,773 fully vaccinated)
#27. Weld County, CO
- Cumulative cases per 100k: 31,134 (101,028 total cases)
--- 6.5% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 231 (751 total deaths)
--- 1.3% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 63.1% (204,897 fully vaccinated)
#26. Broomfield County, CO
- Cumulative cases per 100k: 24,795 (17,472 total cases)
--- 15.2% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 176 (124 total deaths)
--- 24.8% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 83.0% (58,506 fully vaccinated)
#25. Archuleta County, CO
- Cumulative cases per 100k: 24,271 (3,405 total cases)
--- 17.0% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 157 (22 total deaths)
--- 32.9% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 59.3% (8,320 fully vaccinated)
#24. Costilla County, CO
- Cumulative cases per 100k: 23,154 (900 total cases)
--- 20.8% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 489 (19 total deaths)
--- 109.0% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 61.8% (2,402 fully vaccinated)
#23. Huerfano County, CO
- Cumulative cases per 100k: 24,576 (1,695 total cases)
--- 16.0% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 580 (40 total deaths)
--- 147.9% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 55.7% (3,844 fully vaccinated)
#22. La Plata County, CO
- Cumulative cases per 100k: 27,066 (15,217 total cases)
--- 7.4% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 165 (93 total deaths)
--- 29.5% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 72.8% (40,930 fully vaccinated)
#21. Conejos County, CO
- Cumulative cases per 100k: 26,679 (2,189 total cases)
--- 8.8% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 695 (57 total deaths)
--- 197.0% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 51.0% (4,183 fully vaccinated)
#20. San Juan County, CO
- Cumulative cases per 100k: 42,308 (308 total cases)
--- 44.7% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 0 (0 total deaths)
--- 100.0% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 95.0% (716 fully vaccinated)
#19. El Paso County, CO
- Cumulative cases per 100k: 31,431 (226,428 total cases)
--- 7.5% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 252 (1,819 total deaths)
--- 7.7% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 67.4% (485,751 fully vaccinated)
#18. Larimer County, CO
- Cumulative cases per 100k: 28,699 (102,427 total cases)
--- 1.9% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 157 (559 total deaths)
--- 32.9% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 70.5% (251,573 fully vaccinated)
#17. Custer County, CO
- Cumulative cases per 100k: 15,805 (801 total cases)
--- 45.9% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 434 (22 total deaths)
--- 85.5% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 51.0% (2,585 fully vaccinated)
#16. Otero County, CO
- Cumulative cases per 100k: 27,651 (5,054 total cases)
--- 5.4% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 728 (133 total deaths)
--- 211.1% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 50.5% (9,232 fully vaccinated)
#15. Phillips County, CO
- Cumulative cases per 100k: 24,150 (1,030 total cases)
--- 17.4% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 445 (19 total deaths)
--- 90.2% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 53.6% (2,285 fully vaccinated)
#14. Mesa County, CO
- Cumulative cases per 100k: 31,794 (49,030 total cases)
--- 8.7% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 392 (604 total deaths)
--- 67.5% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 51.5% (79,479 fully vaccinated)
#13. Logan County, CO
- Cumulative cases per 100k: 36,914 (8,272 total cases)
--- 26.2% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 513 (115 total deaths)
--- 119.2% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 39.2% (8,787 fully vaccinated)
#12. Montezuma County, CO
- Cumulative cases per 100k: 27,533 (7,209 total cases)
--- 5.8% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 328 (86 total deaths)
--- 40.2% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 71.6% (18,757 fully vaccinated)
#11. Dolores County, CO
- Cumulative cases per 100k: 19,611 (403 total cases)
--- 32.9% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 389 (8 total deaths)
--- 66.2% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 43.2% (887 fully vaccinated)
#10. Bent County, CO
- Cumulative cases per 100k: 51,264 (2,859 total cases)
--- 75.3% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 879 (49 total deaths)
--- 275.6% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 27.4% (1,529 fully vaccinated)
#9. Saguache County, CO
- Cumulative cases per 100k: 21,322 (1,455 total cases)
--- 27.1% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 176 (12 total deaths)
--- 24.8% less deaths per 100k residents than Colorado
- Population that is fully vaccinated: 36.9% (2,515 fully vaccinated)
#8. Fremont County, CO
- Cumulative cases per 100k: 37,102 (17,749 total cases)
--- 26.9% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 420 (201 total deaths)
--- 79.5% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 47.9% (22,923 fully vaccinated)
#7. Rio Blanco County, CO
- Cumulative cases per 100k: 33,128 (2,095 total cases)
--- 13.3% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 237 (15 total deaths)
--- 1.3% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 39.7% (2,508 fully vaccinated)
#6. Pueblo County, CO
- Cumulative cases per 100k: 34,762 (58,547 total cases)
--- 18.9% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 503 (848 total deaths)
--- 115.0% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 58.6% (98,614 fully vaccinated)
#5. Alamosa County, CO
- Cumulative cases per 100k: 34,405 (5,585 total cases)
--- 17.7% more cases per 100k residents than Colorado
- Cumulative deaths per 100k: 400 (65 total deaths)
--- 70.9% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 58.1% (9,425 fully vaccinated)
#4. Las Animas County, CO
- Cumulative cases per 100k: 28,788 (4,176 total cases)
--- 1.5% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 324 (47 total deaths)
--- 38.5% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 63.0% (9,137 fully vaccinated)
#3. Prowers County, CO
- Cumulative cases per 100k: 24,951 (3,037 total cases)
--- 14.7% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 427 (52 total deaths)
--- 82.5% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 44.2% (5,374 fully vaccinated)
#2. Moffat County, CO
- Cumulative cases per 100k: 26,568 (3,529 total cases)
--- 9.1% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 414 (55 total deaths)
--- 76.9% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 44.7% (5,943 fully vaccinated)
#1. Kiowa County, CO
- Cumulative cases per 100k: 26,174 (368 total cases)
--- 10.5% less cases per 100k residents than Colorado
- Cumulative deaths per 100k: 427 (6 total deaths)
--- 82.5% more deaths per 100k residents than Colorado
- Population that is fully vaccinated: 38.1% (535 fully vaccinated)