Indiana Population By County in 2018
Updated on January 29, 2024.
According to the US Census Bureau population estimates, there were 6,698,481 people living in Indiana in 2018. Marion County was the most populated county with 959,370 residents, followed by Lake County with 484,918 residents, and Allen County with 375,076 residents. Ohio County with a population of 5,880 was the least populated county in Indiana in 2018.
Use the map below to interactively explore the population for each county in Indiana in 2018. The data can also be explored further by sorting and filtering with the table below.
You can see similar information for other states and by state for the United States.
Related Topics: Indiana Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
Indiana Population By County in 2018
Table of Indiana Population By County in 2018
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| County | Population | % of State Population |
|---|---|---|
| Adams | 35,565 | 0.53% |
| Allen | 375,076 | 5.60% |
| Bartholomew | 83,062 | 1.24% |
| Benton | 8,677 | 0.13% |
| Blackford | 11,934 | 0.18% |
| Boone | 66,999 | 1.00% |
| Brown | 15,244 | 0.23% |
| Carroll | 20,208 | 0.30% |
| Cass | 37,885 | 0.57% |
| Clark | 117,287 | 1.75% |
| Clay | 26,215 | 0.39% |
| Clinton | 32,113 | 0.48% |
| Crawford | 10,585 | 0.16% |
| Daviess | 33,314 | 0.50% |
| Dearborn | 49,560 | 0.74% |
| Decatur | 26,685 | 0.40% |
| DeKalb | 43,231 | 0.65% |
| Delaware | 114,118 | 1.70% |
| Dubois | 42,568 | 0.64% |
| Elkhart | 205,588 | 3.07% |
| Fayette | 23,026 | 0.34% |
| Floyd | 77,870 | 1.16% |
| Fountain | 16,439 | 0.25% |
| Franklin | 22,752 | 0.34% |
| Fulton | 20,113 | 0.30% |
| Gibson | 33,622 | 0.50% |
| Grant | 66,112 | 0.99% |
| Greene | 32,124 | 0.48% |
| Hamilton | 330,635 | 4.94% |
| Hancock | 76,521 | 1.14% |
| Harrison | 40,258 | 0.60% |
| Hendricks | 166,759 | 2.49% |
| Henry | 48,205 | 0.72% |
| Howard | 82,339 | 1.23% |
| Huntington | 36,249 | 0.54% |
| Jackson | 44,049 | 0.66% |
| Jasper | 33,356 | 0.50% |
| Jay | 20,721 | 0.31% |
| Jefferson | 32,169 | 0.48% |
| Jennings | 27,650 | 0.41% |
| Johnson | 156,301 | 2.33% |
| Knox | 36,602 | 0.55% |
| Kosciusko | 79,467 | 1.19% |
| LaGrange | 39,425 | 0.59% |
| Lake | 484,918 | 7.24% |
| LaPorte | 110,134 | 1.64% |
| Lawrence | 45,690 | 0.68% |
| Madison | 129,509 | 1.93% |
| Marion | 959,370 | 14.32% |
| Marshall | 46,311 | 0.69% |
| Martin | 10,204 | 0.15% |
| Miami | 35,652 | 0.53% |
| Monroe | 147,411 | 2.20% |
| Montgomery | 38,251 | 0.57% |
| Morgan | 70,108 | 1.05% |
| Newton | 13,979 | 0.21% |
| Noble | 47,649 | 0.71% |
| Ohio | 5,880 | 0.09% |
| Orange | 19,567 | 0.29% |
| Owen | 20,879 | 0.31% |
| Parke | 16,955 | 0.25% |
| Perry | 19,100 | 0.28% |
| Pike | 12,384 | 0.19% |
| Porter | 169,647 | 2.53% |
| Posey | 25,529 | 0.38% |
| Pulaski | 12,502 | 0.19% |
| Putnam | 37,494 | 0.56% |
| Randolph | 24,736 | 0.37% |
| Ripley | 28,526 | 0.43% |
| Rush | 16,635 | 0.25% |
| St. Joseph | 270,961 | 4.05% |
| Scott | 23,773 | 0.36% |
| Shelby | 44,535 | 0.67% |
| Spencer | 20,385 | 0.30% |
| Starke | 22,953 | 0.34% |
| Steuben | 34,570 | 0.52% |
| Sullivan | 20,673 | 0.31% |
| Switzerland | 10,757 | 0.16% |
| Tippecanoe | 193,705 | 2.89% |
| Tipton | 15,100 | 0.23% |
| Union | 7,086 | 0.11% |
| Vanderburgh | 181,165 | 2.71% |
| Vermillion | 15,508 | 0.23% |
| Vigo | 107,438 | 1.60% |
| Wabash | 31,210 | 0.47% |
| Warren | 8,268 | 0.12% |
| Warrick | 62,443 | 0.93% |
| Washington | 27,936 | 0.42% |
| Wayne | 66,131 | 0.99% |
| Wells | 27,982 | 0.42% |
| White | 24,168 | 0.36% |
| Whitley | 34,036 | 0.51% |