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.
The United States as of Oct. 28 reached over 1 million COVID-19-related deaths and 97.4 million COVID-19 cases, according to Johns Hopkins University. Currently, 68.4% of the population is fully vaccinated, and 7.3% of people have received the most recent bivalent booster dose.
Stacker compiled a list of the counties with highest COVID-19 vaccination rates in Iowa using data from the U.S. Department of Health & Human Services and Covid Act Now. Counties are ranked by the highest vaccination rate as of Oct. 27, 2022. Due to inconsistencies in reporting, some counties do not have vaccination data available. Case count data based on Oct. 13 numbers reported by the Department of Health and Human Services. Keep reading to see whether your county ranks among the highest COVID-19 vaccination rates in your state.
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1 / 50
#50. Fayette County
- Population that is fully vaccinated: 55.6% (10,917 fully vaccinated)
--- 12.0% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 427 (84 total deaths)
--- 32.2% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 24,056 (4,727 total cases)
--- 12.0% less cases per 100k residents than Iowa
2 / 50
#49. Henry County
- Population that is fully vaccinated: 55.6% (11,098 fully vaccinated)
--- 12.0% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 401 (80 total deaths)
--- 24.1% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 31,227 (6,231 total cases)
--- 14.2% more cases per 100k residents than Iowa
3 / 50
#48. Franklin County
- Population that is fully vaccinated: 55.7% (5,606 fully vaccinated)
--- 11.9% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 467 (47 total deaths)
--- 44.6% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,934 (2,813 total cases)
--- 2.1% more cases per 100k residents than Iowa
4 / 50
#47. Delaware County
- Population that is fully vaccinated: 55.8% (9,490 fully vaccinated)
--- 11.7% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 406 (69 total deaths)
--- 25.7% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 26,653 (4,534 total cases)
--- 2.5% less cases per 100k residents than Iowa
5 / 50
#46. Clinton County
- Population that is fully vaccinated: 55.9% (25,965 fully vaccinated)
--- 11.6% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 349 (162 total deaths)
--- 8.0% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 28,627 (13,291 total cases)
--- 4.7% more cases per 100k residents than Iowa
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6 / 50
#45. Clarke County
- Population that is fully vaccinated: 56.0% (5,257 fully vaccinated)
--- 11.4% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 436 (41 total deaths)
--- 35.0% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,227 (2,558 total cases)
--- 0.4% less cases per 100k residents than Iowa
7 / 50
#44. Chickasaw County
- Population that is fully vaccinated: 56.0% (6,685 fully vaccinated)
--- 11.4% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 285 (34 total deaths)
--- 11.8% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,316 (3,021 total cases)
--- 7.4% less cases per 100k residents than Iowa
8 / 50
#43. Hardin County
- Population that is fully vaccinated: 56.8% (9,569 fully vaccinated)
--- 10.1% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 392 (66 total deaths)
--- 21.4% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 28,387 (4,782 total cases)
--- 3.8% more cases per 100k residents than Iowa
9 / 50
#42. Adams County
- Population that is fully vaccinated: 57.1% (2,058 fully vaccinated)
--- 9.7% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 389 (14 total deaths)
--- 20.4% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,125 (905 total cases)
--- 8.1% less cases per 100k residents than Iowa
10 / 50
#41. Washington County
- Population that is fully vaccinated: 58.1% (12,769 fully vaccinated)
--- 8.1% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 378 (83 total deaths)
--- 17.0% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 29,342 (6,445 total cases)
--- 7.3% more cases per 100k residents than Iowa
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11 / 50
#40. Montgomery County
- Population that is fully vaccinated: 58.4% (5,795 fully vaccinated)
--- 7.6% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 575 (57 total deaths)
--- 78.0% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 24,846 (2,464 total cases)
--- 9.2% less cases per 100k residents than Iowa
12 / 50
#39. Butler County
- Population that is fully vaccinated: 58.4% (8,438 fully vaccinated)
--- 7.6% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 388 (56 total deaths)
--- 20.1% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,099 (3,624 total cases)
--- 8.2% less cases per 100k residents than Iowa
13 / 50
#38. Woodbury County
- Population that is fully vaccinated: 58.4% (60,198 fully vaccinated)
--- 7.6% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 338 (349 total deaths)
--- 4.6% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 30,844 (31,802 total cases)
--- 12.8% more cases per 100k residents than Iowa
14 / 50
#37. Mills County
- Population that is fully vaccinated: 58.6% (8,854 fully vaccinated)
--- 7.3% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 298 (45 total deaths)
--- 7.7% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,217 (3,810 total cases)
--- 7.8% less cases per 100k residents than Iowa
15 / 50
#36. Wright County
- Population that is fully vaccinated: 58.8% (7,381 fully vaccinated)
--- 7.0% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 549 (69 total deaths)
--- 70.0% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 31,118 (3,909 total cases)
--- 13.8% more cases per 100k residents than Iowa
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16 / 50
#35. Webster County
- Population that is fully vaccinated: 58.8% (21,107 fully vaccinated)
--- 7.0% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 496 (178 total deaths)
--- 53.6% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 32,322 (11,605 total cases)
--- 18.2% more cases per 100k residents than Iowa
17 / 50
#34. Cass County
- Population that is fully vaccinated: 59.3% (7,614 fully vaccinated)
--- 6.2% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 639 (82 total deaths)
--- 97.8% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 24,478 (3,142 total cases)
--- 10.5% less cases per 100k residents than Iowa
18 / 50
#33. Greene County
- Population that is fully vaccinated: 59.5% (5,292 fully vaccinated)
--- 5.9% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 293 (26 total deaths)
--- 9.3% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 21,816 (1,939 total cases)
--- 20.2% less cases per 100k residents than Iowa
19 / 50
#32. Guthrie County
- Population that is fully vaccinated: 59.5% (6,362 fully vaccinated)
--- 5.9% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 440 (47 total deaths)
--- 36.2% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 24,876 (2,659 total cases)
--- 9.0% less cases per 100k residents than Iowa
20 / 50
#31. Audubon County
- Population that is fully vaccinated: 59.6% (3,273 fully vaccinated)
--- 5.7% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 418 (23 total deaths)
--- 29.4% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 22,616 (1,243 total cases)
--- 17.3% less cases per 100k residents than Iowa
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21 / 50
#30. Jones County
- Population that is fully vaccinated: 59.6% (12,316 fully vaccinated)
--- 5.7% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 382 (79 total deaths)
--- 18.3% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 29,810 (6,165 total cases)
--- 9.0% more cases per 100k residents than Iowa
22 / 50
#29. Jasper County
- Population that is fully vaccinated: 59.6% (22,171 fully vaccinated)
--- 5.7% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 320 (119 total deaths)
--- 0.9% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 26,626 (9,901 total cases)
--- 2.6% less cases per 100k residents than Iowa
23 / 50
#28. Pottawattamie County
- Population that is fully vaccinated: 59.7% (55,644 fully vaccinated)
--- 5.5% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 360 (336 total deaths)
--- 11.5% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 28,804 (26,847 total cases)
--- 5.3% more cases per 100k residents than Iowa
24 / 50
#27. Benton County
- Population that is fully vaccinated: 60.3% (15,472 fully vaccinated)
--- 4.6% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 312 (80 total deaths)
--- 3.4% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 26,621 (6,827 total cases)
--- 2.7% less cases per 100k residents than Iowa
25 / 50
#26. Poweshiek County
- Population that is fully vaccinated: 60.4% (11,173 fully vaccinated)
--- 4.4% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 346 (64 total deaths)
--- 7.1% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 23,698 (4,385 total cases)
--- 13.4% less cases per 100k residents than Iowa
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26 / 50
#25. Shelby County
- Population that is fully vaccinated: 60.6% (6,936 fully vaccinated)
--- 4.1% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 463 (53 total deaths)
--- 43.3% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 26,235 (3,005 total cases)
--- 4.1% less cases per 100k residents than Iowa
27 / 50
#24. Dickinson County
- Population that is fully vaccinated: 60.6% (10,466 fully vaccinated)
--- 4.1% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 440 (76 total deaths)
--- 36.2% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 26,486 (4,571 total cases)
--- 3.2% less cases per 100k residents than Iowa
28 / 50
#23. Calhoun County
- Population that is fully vaccinated: 60.7% (5,867 fully vaccinated)
--- 4.0% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 269 (26 total deaths)
--- 16.7% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 30,296 (2,929 total cases)
--- 10.8% more cases per 100k residents than Iowa
29 / 50
#22. Warren County
- Population that is fully vaccinated: 61.2% (31,501 fully vaccinated)
--- 3.2% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 282 (145 total deaths)
--- 12.7% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,107 (13,951 total cases)
--- 0.9% less cases per 100k residents than Iowa
30 / 50
#21. Bremer County
- Population that is fully vaccinated: 61.3% (15,359 fully vaccinated)
--- 3.0% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 339 (85 total deaths)
--- 5.0% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 24,447 (6,127 total cases)
--- 10.6% less cases per 100k residents than Iowa
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31 / 50
#20. Cedar County
- Population that is fully vaccinated: 61.4% (11,432 fully vaccinated)
--- 2.8% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 231 (43 total deaths)
--- 28.5% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,662 (4,780 total cases)
--- 6.2% less cases per 100k residents than Iowa
32 / 50
#19. Black Hawk County
- Population that is fully vaccinated: 62.0% (81,308 fully vaccinated)
--- 1.9% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 386 (507 total deaths)
--- 19.5% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 28,286 (37,119 total cases)
--- 3.4% more cases per 100k residents than Iowa
33 / 50
#18. Muscatine County
- Population that is fully vaccinated: 62.2% (26,558 fully vaccinated)
--- 1.6% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 323 (138 total deaths)
--- 0.0% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,415 (10,843 total cases)
--- 7.1% less cases per 100k residents than Iowa
34 / 50
#17. Carroll County
- Population that is fully vaccinated: 62.8% (12,670 fully vaccinated)
--- 0.6% lower vaccination rate than Iowa
- Cumulative deaths per 100k: 377 (76 total deaths)
--- 16.7% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,087 (5,462 total cases)
--- 1.0% less cases per 100k residents than Iowa
35 / 50
#16. Grundy County
- Population that is fully vaccinated: 63.4% (7,755 fully vaccinated)
--- 0.3% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 392 (48 total deaths)
--- 21.4% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 23,324 (2,853 total cases)
--- 14.7% less cases per 100k residents than Iowa
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36 / 50
#15. Scott County
- Population that is fully vaccinated: 63.4% (109,649 fully vaccinated)
--- 0.3% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 246 (426 total deaths)
--- 23.8% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,099 (46,866 total cases)
--- 0.9% less cases per 100k residents than Iowa
37 / 50
#14. Iowa County
- Population that is fully vaccinated: 63.8% (10,319 fully vaccinated)
--- 0.9% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 309 (50 total deaths)
--- 4.3% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,568 (4,138 total cases)
--- 6.5% less cases per 100k residents than Iowa
38 / 50
#13. Tama County
- Population that is fully vaccinated: 64.0% (10,786 fully vaccinated)
--- 1.3% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 570 (96 total deaths)
--- 76.5% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 26,160 (4,409 total cases)
--- 4.4% less cases per 100k residents than Iowa
39 / 50
#12. Winneshiek County
- Population that is fully vaccinated: 64.2% (12,828 fully vaccinated)
--- 1.6% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 275 (55 total deaths)
--- 14.9% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 21,780 (4,354 total cases)
--- 20.4% less cases per 100k residents than Iowa
40 / 50
#11. Cerro Gordo County
- Population that is fully vaccinated: 64.7% (27,474 fully vaccinated)
--- 2.4% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 412 (175 total deaths)
--- 27.6% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 29,001 (12,311 total cases)
--- 6.0% more cases per 100k residents than Iowa
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41 / 50
#10. Story County
- Population that is fully vaccinated: 64.8% (62,976 fully vaccinated)
--- 2.5% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 99 (96 total deaths)
--- 69.3% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 22,952 (22,290 total cases)
--- 16.1% less cases per 100k residents than Iowa
42 / 50
#9. Hamilton County
- Population that is fully vaccinated: 64.9% (9,584 fully vaccinated)
--- 2.7% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 535 (79 total deaths)
--- 65.6% more deaths per 100k residents than Iowa
- Cumulative cases per 100k: 25,824 (3,815 total cases)
--- 5.6% less cases per 100k residents than Iowa
43 / 50
#8. Boone County
- Population that is fully vaccinated: 66.0% (17,303 fully vaccinated)
--- 4.4% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 248 (65 total deaths)
--- 23.2% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 23,774 (6,237 total cases)
--- 13.1% less cases per 100k residents than Iowa
44 / 50
#7. Dubuque County
- Population that is fully vaccinated: 66.0% (64,243 fully vaccinated)
--- 4.4% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 322 (313 total deaths)
--- 0.3% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 30,219 (29,406 total cases)
--- 10.5% more cases per 100k residents than Iowa
45 / 50
#6. Marshall County
- Population that is fully vaccinated: 67.9% (26,726 fully vaccinated)
--- 7.4% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 318 (125 total deaths)
--- 1.5% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,395 (10,785 total cases)
--- 0.2% more cases per 100k residents than Iowa
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46 / 50
#5. Linn County
- Population that is fully vaccinated: 68.3% (154,924 fully vaccinated)
--- 8.1% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 277 (628 total deaths)
--- 14.2% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,021 (61,258 total cases)
--- 1.2% less cases per 100k residents than Iowa
47 / 50
#4. Dallas County
- Population that is fully vaccinated: 68.7% (64,219 fully vaccinated)
--- 8.7% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 163 (152 total deaths)
--- 49.5% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 27,745 (25,929 total cases)
--- 1.4% more cases per 100k residents than Iowa
48 / 50
#3. Polk County
- Population that is fully vaccinated: 69.6% (341,189 fully vaccinated)
--- 10.1% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 239 (1,172 total deaths)
--- 26.0% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 28,922 (141,764 total cases)
--- 5.7% more cases per 100k residents than Iowa
49 / 50
#2. Buena Vista County
- Population that is fully vaccinated: 70.6% (13,860 fully vaccinated)
--- 11.7% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 316 (62 total deaths)
--- 2.2% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 34,475 (6,764 total cases)
--- 26.1% more cases per 100k residents than Iowa
50 / 50
#1. Johnson County
- Population that is fully vaccinated: 75.5% (114,118 fully vaccinated)
--- 19.5% higher vaccination rate than Iowa
- Cumulative deaths per 100k: 110 (167 total deaths)
--- 65.9% less deaths per 100k residents than Iowa
- Cumulative cases per 100k: 28,248 (42,694 total cases)
--- 3.3% more cases per 100k residents than Iowa
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