Ranking of Indiana Counties By Population in 2021
Updated on June 21, 2025.
Based on the US Census Vintage data estimates, in 2021, the Population for Indiana was 6.82M. Among all Indiana counties, Marion County had the highest population (971.68K), followed by Lake County (499.32K), and Allen County (389.22K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Indiana counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: Indiana Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2021 Census.
See this for other years:
Ranking of Indiana Counties By Population in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Marion County | 971682 |
| 2 | Lake County | 499319 |
| 3 | Allen County | 389220 |
| 4 | Hamilton County | 357691 |
| 5 | St. Joseph County | 272315 |
| 6 | Elkhart County | 207093 |
| 7 | Tippecanoe County | 187428 |
| 8 | Vanderburgh County | 180188 |
| 9 | Hendricks County | 179830 |
| 10 | Porter County | 174591 |
| 11 | Johnson County | 164440 |
| 12 | Monroe County | 141243 |
| 13 | Madison County | 130846 |
| 14 | Clark County | 122922 |
| 15 | LaPorte County | 112552 |
| 16 | Delaware County | 112059 |
| 17 | Vigo County | 106127 |
| 18 | Howard County | 83653 |
| 19 | Bartholomew County | 82732 |
| 20 | Hancock County | 81899 |
| 21 | Floyd County | 80598 |
| 22 | Kosciusko County | 80265 |
| 23 | Boone County | 73087 |
| 24 | Morgan County | 72289 |
| 25 | Wayne County | 66453 |
| 26 | Grant County | 66189 |
| 27 | Warrick County | 64660 |
| 28 | Dearborn County | 50888 |
| 29 | Henry County | 49038 |
| 30 | Noble County | 47408 |
| 31 | Jackson County | 46231 |
| 32 | Marshall County | 46168 |
| 33 | Shelby County | 45113 |
| 34 | Lawrence County | 45063 |
| 35 | Dubois County | 43569 |
| 36 | DeKalb County | 43417 |
| 37 | LaGrange County | 40527 |
| 38 | Harrison County | 39808 |
| 39 | Montgomery County | 38069 |
| 40 | Cass County | 37573 |
| 41 | Putnam County | 37036 |
| 42 | Huntington County | 36788 |
| 43 | Adams County | 36012 |
| 44 | Miami County | 36003 |
| 45 | Knox County | 35982 |
| 46 | Steuben County | 34712 |
| 47 | Whitley County | 34481 |
| 48 | Daviess County | 33410 |
| 49 | Jasper County | 33155 |
| 50 | Jefferson County | 33124 |
| 51 | Clinton County | 32982 |
| 52 | Gibson County | 32981 |
| 53 | Wabash County | 30888 |
| 54 | Greene County | 30874 |
| 55 | Ripley County | 29025 |
| 56 | Wells County | 28165 |
| 57 | Washington County | 28137 |
| 58 | Jennings County | 27513 |
| 59 | Clay County | 26399 |
| 60 | Decatur County | 26360 |
| 61 | Posey County | 25170 |
| 62 | White County | 24648 |
| 63 | Scott County | 24423 |
| 64 | Randolph County | 24415 |
| 65 | Fayette County | 23381 |
| 66 | Starke County | 23380 |
| 67 | Franklin County | 22892 |
| 68 | Owen County | 21519 |
| 69 | Sullivan County | 20787 |
| 70 | Carroll County | 20519 |
| 71 | Fulton County | 20415 |
| 72 | Jay County | 20293 |
| 73 | Spencer County | 19841 |
| 74 | Orange County | 19816 |
| 75 | Perry County | 19341 |
| 76 | Rush County | 16689 |
| 77 | Parke County | 16506 |
| 78 | Fountain County | 16485 |
| 79 | Brown County | 15590 |
| 80 | Vermillion County | 15429 |
| 81 | Tipton County | 15393 |
| 82 | Newton County | 13815 |
| 83 | Pulaski County | 12368 |
| 84 | Pike County | 12176 |
| 85 | Blackford County | 12047 |
| 86 | Crawford County | 10490 |
| 87 | Switzerland County | 9863 |
| 88 | Martin County | 9807 |
| 89 | Benton County | 8678 |
| 90 | Warren County | 8453 |
| 91 | Union County | 7016 |
| 92 | Ohio County | 5992 |
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