Indiana Counties by Population (2026)
2026 Pop.
100K
200K
300K
400K
500K
600K
700K
800K
900K
Top 5 Most Populous Counties
993,576
507,683
407,623
393,936
273,916
92 Counties
| County | 2026 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Marion County | 993,576 | 396 | 2,509 | 1.73% |
| Lake County | 507,683 | 499 | 1,017 | 1.75% |
| Allen County | 407,623 | 657 | 620 | 5.57% |
| Hamilton County | 393,936 | 394 | 1,000 | 12.87% |
| St. Joseph County | 273,916 | 458 | 598 | 0.45% |
| Elkhart County | 208,382 | 463 | 450 | 0.66% |
| Hendricks County | 197,605 | 407 | 486 | 12.52% |
| Tippecanoe County | 193,986 | 499 | 389 | 4.07% |
| Vanderburgh County | 181,277 | 233 | 778 | 0.52% |
| Porter County | 177,002 | 418 | 423 | 2.11% |
| Johnson County | 175,232 | 320 | 548 | 7.99% |
| Monroe County | 140,002 | 395 | 354 | -0.46% |
| Madison County | 137,174 | 452 | 303 | 5.39% |
| Clark County | 131,065 | 372 | 352 | 7.98% |
| Delaware County | 113,957 | 392 | 291 | 1.97% |
| LaPorte County | 110,872 | 598 | 185 | -1.26% |
| Vigo County | 106,392 | 404 | 263 | 0.24% |
| Hancock County | 94,078 | 306 | 307 | 17.33% |
| Bartholomew County | 85,727 | 407 | 211 | 4.27% |
| Howard County | 84,532 | 293 | 289 | 1.13% |
| Floyd County | 84,029 | 148 | 568 | 4.36% |
| Boone County | 83,929 | 423 | 198 | 17.99% |
| Kosciusko County | 81,125 | 531 | 153 | 1.2% |
| Morgan County | 75,275 | 404 | 186 | 4.78% |
| Warrick County | 66,991 | 385 | 174 | 4.68% |
| Grant County | 66,768 | 414 | 161 | 0.39% |
| Wayne County | 66,684 | 402 | 166 | 0.26% |
| Dearborn County | 51,477 | 305 | 169 | 1.42% |
| Henry County | 49,257 | 392 | 126 | 0.71% |
| Jackson County | 48,686 | 510 | 95 | 4.75% |
| Noble County | 48,417 | 411 | 118 | 2% |
| Marshall County | 46,746 | 444 | 105 | 1.46% |
| Shelby County | 46,400 | 411 | 113 | 2.96% |
| Lawrence County | 45,508 | 449 | 101 | 1.11% |
| DeKalb County | 44,636 | 363 | 123 | 3.07% |
| Dubois County | 43,531 | 427 | 102 | -0.26% |
| LaGrange County | 41,408 | 380 | 109 | 2.16% |
| Harrison County | 39,912 | 484 | 82 | 0.6% |
| Montgomery County | 38,757 | 505 | 77 | 2.15% |
| Putnam County | 38,256 | 481 | 80 | 4.29% |
| Huntington County | 37,196 | 383 | 97 | 1.51% |
| Cass County | 37,073 | 412 | 90 | -1.91% |
| Adams County | 36,814 | 339 | 109 | 2.65% |
| Miami County | 35,885 | 374 | 96 | -0.06% |
| Knox County | 35,562 | 516 | 69 | -1.92% |
| Whitley County | 35,083 | 336 | 104 | 2.16% |
| Steuben County | 34,834 | 309 | 113 | 1.12% |
| Daviess County | 34,689 | 430 | 81 | 3.96% |
| Gibson County | 33,276 | 487 | 68 | 0.66% |
| Jasper County | 33,249 | 560 | 59 | 1.08% |
| Clinton County | 32,927 | 405 | 81 | -0.74% |
| Jefferson County | 32,887 | 361 | 91 | -0.65% |
| Greene County | 31,393 | 542 | 58 | 1.91% |
| Wabash County | 30,807 | 413 | 75 | -0.38% |
| Ripley County | 29,226 | 446 | 66 | 0.83% |
| Wells County | 29,122 | 368 | 79 | 3.42% |
| Washington County | 28,657 | 514 | 56 | 1.5% |
| Jennings County | 27,674 | 377 | 73 | 0.34% |
| Decatur County | 26,473 | 373 | 71 | -0.01% |
| Clay County | 26,434 | 358 | 74 | 0.03% |
| Posey County | 25,107 | 409 | 61 | -0.31% |
| Scott County | 25,003 | 190 | 132 | 2.57% |
| White County | 24,949 | 505 | 49 | 1.11% |
| Randolph County | 24,291 | 452 | 54 | -0.51% |
| Starke County | 23,721 | 309 | 77 | 1.38% |
| Fayette County | 23,493 | 215 | 109 | 0.59% |
| Franklin County | 23,060 | 384 | 60 | 1.19% |
| Owen County | 22,003 | 385 | 57 | 3.18% |
| Carroll County | 21,101 | 372 | 57 | 3.79% |
| Sullivan County | 20,660 | 447 | 46 | -0.76% |
| Spencer County | 20,540 | 397 | 52 | 3.56% |
| Jay County | 20,354 | 384 | 53 | -0.62% |
| Orange County | 20,050 | 398 | 50 | 0.99% |
| Perry County | 19,378 | 382 | 51 | 1.15% |
| Fulton County | 19,374 | 368 | 53 | -5.34% |
| Fountain County | 17,151 | 396 | 43 | 3.99% |
| Rush County | 16,647 | 408 | 41 | -0.73% |
| Parke County | 16,558 | 445 | 37 | 2.42% |
| Vermillion County | 15,822 | 257 | 62 | 2.74% |
| Brown County | 15,568 | 312 | 50 | 0.57% |
| Tipton County | 15,382 | 261 | 59 | -0.04% |
| Newton County | 14,327 | 402 | 36 | 3.88% |
| Pulaski County | 12,395 | 434 | 29 | -1% |
| Pike County | 12,170 | 334 | 36 | -0.67% |
| Blackford County | 11,698 | 165 | 71 | -3.39% |
| Crawford County | 10,685 | 306 | 35 | 1.55% |
| Switzerland County | 10,034 | 221 | 45 | 3% |
| Martin County | 9,868 | 336 | 29 | 0.59% |
| Benton County | 9,037 | 406 | 22 | 3.79% |
| Warren County | 8,357 | 365 | 23 | -0.81% |
| Union County | 6,708 | 161 | 42 | -5.24% |
| Ohio County | 6,002 | 86 | 70 | 1.3% |
Overview of Indiana Counties
There are 92 counties in Indiana.
Marion County is the largest county in the state, with a population of 993,576. The most recent census shows that its population has increased by 0.02% since the previous census.
A number of other Indiana counties also boast relatively large populations for their state, though not able to match the density of Marion County:
- Lake County : 507,683
- Allen County : 407,623
Indiana Counties with the Fewest Residents
The smallest county in Indiana is Ohio County , with a population of just 6,002. This total represents a increase of 0.0% since the last census count was performed.
Other small counties include:
- Union County : 6,708
- Warren County : 8,357
- Benton County : 9,037
Indiana Counties with Rapid Growth
Boone County , with its current population of 83,929, has shown the largest population growth, with an increase of 0.2% since the last census.
Lake County has also had relatively high population growth of 0.02% with 507,683 residents.
On the other hand, Fulton County has had the largest decrease in population, with its 19,374 current residents totalling 0.1% less than the previous census.
Sources
- US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
- American Community Survey (2009 - 2013)
- Census QuickFacts
- Historical Populations of States and Counties (1790 - 1990)