Counties with highest COVID-19 infection rates in Idaho
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 May 18 reached over 1 million COVID-19-related deaths and 83.4 million COVID-19 cases, according to Johns Hopkins University. Currently, 66.5% of the population is fully vaccinated, and 46.4% of vaccinated people have received booster doses.
Stacker compiled a list of the counties with highest COVID-19 infection rates in Idaho 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 May 17, 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.
#44. Clark County, ID
- Cumulative cases per 100k: 12,899 (109 total cases)
--- 48.6% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 118 (1 total deaths)
--- 57.2% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 46.2% (390 fully vaccinated)
#43. Camas County, ID
- Cumulative cases per 100k: 14,286 (158 total cases)
--- 43.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 181 (2 total deaths)
--- 34.4% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 43.4% (480 fully vaccinated)
#42. Lemhi County, ID
- Cumulative cases per 100k: 15,709 (1,261 total cases)
--- 37.4% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 311 (25 total deaths)
--- 12.7% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 50.0% (4,016 fully vaccinated)
#41. Butte County, ID
- Cumulative cases per 100k: 18,290 (475 total cases)
--- 27.1% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 347 (9 total deaths)
--- 25.7% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 52.4% (1,361 fully vaccinated)
#40. Lincoln County, ID
- Cumulative cases per 100k: 20,630 (1,107 total cases)
--- 17.8% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 280 (15 total deaths)
--- 1.4% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 42.0% (2,253 fully vaccinated)
#39. Caribou County, ID
- Cumulative cases per 100k: 20,825 (1,490 total cases)
--- 17.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 363 (26 total deaths)
--- 31.5% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 42.2% (3,016 fully vaccinated)
#38. Cassia County, ID
- Cumulative cases per 100k: 20,940 (5,032 total cases)
--- 16.5% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 216 (52 total deaths)
--- 21.7% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 41.6% (10,004 fully vaccinated)
#37. Benewah County, ID
- Cumulative cases per 100k: 25,780 (2,397 total cases)
--- 2.8% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 441 (41 total deaths)
--- 59.8% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 53.0% (4,931 fully vaccinated)
#36. Franklin County, ID
- Cumulative cases per 100k: 16,799 (2,331 total cases)
--- 33.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 209 (29 total deaths)
--- 24.3% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 46.2% (6,410 fully vaccinated)
#35. Minidoka County, ID
- Cumulative cases per 100k: 20,129 (4,235 total cases)
--- 19.8% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 304 (64 total deaths)
--- 10.1% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 42.5% (8,951 fully vaccinated)
#34. Boise County, ID
- Cumulative cases per 100k: 13,970 (1,094 total cases)
--- 44.3% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 179 (14 total deaths)
--- 35.1% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 33.9% (2,651 fully vaccinated)
#33. Power County, ID
- Cumulative cases per 100k: 19,151 (1,471 total cases)
--- 23.7% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 260 (20 total deaths)
--- 5.8% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 51.9% (3,988 fully vaccinated)
#32. Jefferson County, ID
- Cumulative cases per 100k: 20,237 (6,045 total cases)
--- 19.3% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 218 (65 total deaths)
--- 21.0% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 45.1% (13,485 fully vaccinated)
#31. Washington County, ID
- Cumulative cases per 100k: 23,484 (2,394 total cases)
--- 6.4% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 559 (57 total deaths)
--- 102.5% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 42.1% (4,287 fully vaccinated)
#30. Oneida County, ID
- Cumulative cases per 100k: 17,700 (802 total cases)
--- 29.4% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 243 (11 total deaths)
--- 12.0% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 50.0% (2,264 fully vaccinated)
#29. Custer County, ID
- Cumulative cases per 100k: 12,329 (532 total cases)
--- 50.8% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 209 (9 total deaths)
--- 24.3% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 49.4% (2,130 fully vaccinated)
#28. Adams County, ID
- Cumulative cases per 100k: 16,395 (704 total cases)
--- 34.6% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 349 (15 total deaths)
--- 26.4% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 44.9% (1,929 fully vaccinated)
#27. Fremont County, ID
- Cumulative cases per 100k: 16,490 (2,160 total cases)
--- 34.3% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 214 (28 total deaths)
--- 22.5% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 46.6% (6,105 fully vaccinated)
#26. Teton County, ID
- Cumulative cases per 100k: 22,435 (2,724 total cases)
--- 10.6% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 74 (9 total deaths)
--- 73.2% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 63.0% (7,654 fully vaccinated)
#25. Jerome County, ID
- Cumulative cases per 100k: 24,996 (6,102 total cases)
--- 0.4% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 266 (65 total deaths)
--- 3.6% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 46.7% (11,392 fully vaccinated)
#24. Madison County, ID
- Cumulative cases per 100k: 31,771 (12,679 total cases)
--- 26.7% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 125 (50 total deaths)
--- 54.7% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 56.2% (22,427 fully vaccinated)
#23. Gooding County, ID
- Cumulative cases per 100k: 21,727 (3,298 total cases)
--- 13.4% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 369 (56 total deaths)
--- 33.7% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 44.9% (6,817 fully vaccinated)
#22. Lewis County, ID
- Cumulative cases per 100k: 29,573 (1,135 total cases)
--- 17.9% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 756 (29 total deaths)
--- 173.9% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 52.9% (2,032 fully vaccinated)
#21. Gem County, ID
- Cumulative cases per 100k: 20,324 (3,681 total cases)
--- 19.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 436 (79 total deaths)
--- 58.0% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 40.5% (7,344 fully vaccinated)
#20. Bingham County, ID
- Cumulative cases per 100k: 20,987 (9,824 total cases)
--- 16.3% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 331 (155 total deaths)
--- 19.9% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 49.2% (23,018 fully vaccinated)
#19. Bonneville County, ID
- Cumulative cases per 100k: 25,999 (30,955 total cases)
--- 3.6% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 240 (286 total deaths)
--- 13.0% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 55.0% (65,432 fully vaccinated)
#18. Payette County, ID
- Cumulative cases per 100k: 23,331 (5,588 total cases)
--- 7.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 363 (87 total deaths)
--- 31.5% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 32.1% (7,680 fully vaccinated)
#17. Owyhee County, ID
- Cumulative cases per 100k: 19,251 (2,276 total cases)
--- 23.3% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 448 (53 total deaths)
--- 62.3% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 36.2% (4,279 fully vaccinated)

#16. Bannock County, ID
- Cumulative cases per 100k: 23,836 (20,930 total cases)
--- 5.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 281 (247 total deaths)
--- 1.8% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 52.9% (46,476 fully vaccinated)
#15. Twin Falls County, ID
- Cumulative cases per 100k: 27,793 (24,146 total cases)
--- 10.8% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 340 (295 total deaths)
--- 23.2% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 50.7% (44,050 fully vaccinated)
#14. Idaho County, ID
- Cumulative cases per 100k: 17,910 (2,985 total cases)
--- 28.6% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 312 (52 total deaths)
--- 13.0% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 31.7% (5,276 fully vaccinated)
#13. Bear Lake County, ID
- Cumulative cases per 100k: 14,971 (917 total cases)
--- 40.3% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 261 (16 total deaths)
--- 5.4% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 47.3% (2,900 fully vaccinated)
#12. Canyon County, ID
- Cumulative cases per 100k: 26,856 (61,729 total cases)
--- 7.1% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 298 (685 total deaths)
--- 8.0% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 46.8% (107,672 fully vaccinated)
#11. Kootenai County, ID
- Cumulative cases per 100k: 25,453 (42,175 total cases)
--- 1.5% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 358 (594 total deaths)
--- 29.7% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 47.3% (78,348 fully vaccinated)

#10. Shoshone County, ID
- Cumulative cases per 100k: 21,317 (2,746 total cases)
--- 15.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 590 (76 total deaths)
--- 113.8% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 44.0% (5,669 fully vaccinated)
#9. Bonner County, ID
- Cumulative cases per 100k: 19,561 (8,947 total cases)
--- 22.0% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 411 (188 total deaths)
--- 48.9% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 44.1% (20,175 fully vaccinated)
#8. Elmore County, ID
- Cumulative cases per 100k: 26,422 (7,269 total cases)
--- 5.3% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 254 (70 total deaths)
--- 8.0% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 57.2% (15,724 fully vaccinated)
#7. Clearwater County, ID
- Cumulative cases per 100k: 26,542 (2,324 total cases)
--- 5.8% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 377 (33 total deaths)
--- 36.6% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 42.8% (3,748 fully vaccinated)
#6. Nez Perce County, ID
- Cumulative cases per 100k: 22,181 (8,963 total cases)
--- 11.6% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 364 (147 total deaths)
--- 31.9% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 57.0% (23,025 fully vaccinated)
#5. Boundary County, ID
- Cumulative cases per 100k: 17,215 (2,108 total cases)
--- 31.4% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 506 (62 total deaths)
--- 83.3% more deaths per 100k residents than Idaho
- Population that is fully vaccinated: 36.0% (4,406 fully vaccinated)
#4. Latah County, ID
- Cumulative cases per 100k: 16,987 (6,813 total cases)
--- 32.3% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 122 (49 total deaths)
--- 55.8% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 59.3% (23,799 fully vaccinated)
#3. Ada County, ID
- Cumulative cases per 100k: 28,124 (135,440 total cases)
--- 12.1% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 212 (1,022 total deaths)
--- 23.2% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 64.5% (310,777 fully vaccinated)
#2. Valley County, ID
- Cumulative cases per 100k: 23,236 (2,647 total cases)
--- 7.4% less cases per 100k residents than Idaho
- Cumulative deaths per 100k: 140 (16 total deaths)
--- 49.3% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 62.7% (7,141 fully vaccinated)
#1. Blaine County, ID
- Cumulative cases per 100k: 26,372 (6,071 total cases)
--- 5.1% more cases per 100k residents than Idaho
- Cumulative deaths per 100k: 130 (30 total deaths)
--- 52.9% less deaths per 100k residents than Idaho
- Population that is fully vaccinated: 83.5% (19,214 fully vaccinated)