Ranking of Indiana Counties By Population in 2020
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2020, the Population for Indiana was 6.79M. Among all Indiana counties, Marion County had the highest population (976.71K), followed by Lake County (498.96K), and Allen County (386.12K).
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), 2020 Census.
See this for other years:
Ranking of Indiana Counties By Population in 2020
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| Rank | County | Population |
|---|---|---|
| 1 | Marion County | 976706 |
| 2 | Lake County | 498963 |
| 3 | Allen County | 386123 |
| 4 | Hamilton County | 349031 |
| 5 | St. Joseph County | 272688 |
| 6 | Elkhart County | 207009 |
| 7 | Tippecanoe County | 186391 |
| 8 | Vanderburgh County | 180345 |
| 9 | Hendricks County | 175615 |
| 10 | Porter County | 173338 |
| 11 | Johnson County | 162263 |
| 12 | Monroe County | 140645 |
| 13 | Madison County | 130160 |
| 14 | Clark County | 121377 |
| 15 | LaPorte County | 112287 |
| 16 | Delaware County | 111757 |
| 17 | Vigo County | 106133 |
| 18 | Howard County | 83587 |
| 19 | Bartholomew County | 82215 |
| 20 | Floyd County | 80515 |
| 21 | Hancock County | 80180 |
| 22 | Kosciusko County | 80161 |
| 23 | Morgan County | 71842 |
| 24 | Boone County | 71133 |
| 25 | Wayne County | 66514 |
| 26 | Grant County | 66507 |
| 27 | Warrick County | 63994 |
| 28 | Dearborn County | 50756 |
| 29 | Henry County | 48910 |
| 30 | Noble County | 47468 |
| 31 | Jackson County | 46479 |
| 32 | Marshall County | 46073 |
| 33 | Shelby County | 45066 |
| 34 | Lawrence County | 45009 |
| 35 | Dubois County | 43644 |
| 36 | DeKalb County | 43306 |
| 37 | LaGrange County | 40533 |
| 38 | Harrison County | 39673 |
| 39 | Montgomery County | 37943 |
| 40 | Cass County | 37794 |
| 41 | Putnam County | 36682 |
| 42 | Huntington County | 36642 |
| 43 | Knox County | 36257 |
| 44 | Miami County | 35906 |
| 45 | Adams County | 35865 |
| 46 | Steuben County | 34447 |
| 47 | Whitley County | 34340 |
| 48 | Daviess County | 33368 |
| 49 | Clinton County | 33172 |
| 50 | Jefferson County | 33103 |
| 51 | Gibson County | 33058 |
| 52 | Jasper County | 32893 |
| 53 | Wabash County | 30926 |
| 54 | Greene County | 30805 |
| 55 | Ripley County | 28985 |
| 56 | Washington County | 28233 |
| 57 | Wells County | 28160 |
| 58 | Jennings County | 27579 |
| 59 | Decatur County | 26476 |
| 60 | Clay County | 26427 |
| 61 | Posey County | 25185 |
| 62 | White County | 24674 |
| 63 | Randolph County | 24415 |
| 64 | Scott County | 24376 |
| 65 | Starke County | 23399 |
| 66 | Fayette County | 23356 |
| 67 | Franklin County | 22789 |
| 68 | Owen County | 21324 |
| 69 | Sullivan County | 20819 |
| 70 | Jay County | 20481 |
| 71 | Fulton County | 20468 |
| 72 | Carroll County | 20331 |
| 73 | Orange County | 19853 |
| 74 | Spencer County | 19833 |
| 75 | Perry County | 19157 |
| 76 | Rush County | 16769 |
| 77 | Fountain County | 16493 |
| 78 | Parke County | 16167 |
| 79 | Brown County | 15480 |
| 80 | Vermillion County | 15400 |
| 81 | Tipton County | 15388 |
| 82 | Newton County | 13792 |
| 83 | Pulaski County | 12520 |
| 84 | Pike County | 12252 |
| 85 | Blackford County | 12109 |
| 86 | Crawford County | 10522 |
| 87 | Martin County | 9810 |
| 88 | Switzerland County | 9742 |
| 89 | Benton County | 8707 |
| 90 | Warren County | 8425 |
| 91 | Union County | 7079 |
| 92 | Ohio County | 5925 |