Marion County, Indiana
County seat: Indianapolis · Population 992,196 (2025) · 396 sq mi
Marion County is the most populous of Indiana's 92 counties, with 992,196 people (2025 estimate). Its county seat is Indianapolis, which is also the state capital. It is part of the Indianapolis (Region 12) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 16 cities and towns and the 7 neighboring counties.
Marion County facts
- County seat
- Indianapolis
- Population (2025 estimate)
- 992,196 +1.5% since 2020
- Land area
- 396 sq mi 47th largest of 92
- Water area
- 7 sq mi
- Population density
- 2,506 per sq mi
- Established
- 1822
- Named after
- Francis Marion American politician, Continental Army officer (1732-1795)
- Largest city
- Indianapolis 901,116
- Median household income
- $66,346
- Cities and towns
- 16
- ZIP codes
- 41
- Time zone
- Eastern
- FIPS code
- 18097
Cities and towns in Marion County
Marion County has 16 incorporated cities, towns and villages. Populations count the people living inside Marion County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Indianapolis (county seat) | City | 901,116 | |
| Lawrence | City | 50,420 | |
| Beech Grove | City | 14,671 | |
| Speedway | Town | 14,373 | |
| Cumberland | Town | 2,531 | Hancock County |
| Southport | City | 2,094 | |
| Meridian Hills | Town | 1,800 | |
| Warren Park | Town | 1,509 | |
| Clermont | Town | 1,403 | |
| Homecroft | Town | 760 | |
| Rocky Ripple | Town | 658 | |
| Williams Creek | Town | 435 | |
| Wynnedale | Town | 218 | |
| Spring Hill | Town | 97 | |
| Crows Nest | Town | 68 | |
| North Crows Nest | Town | 43 |
ZIP codes in Marion County
41 ZIP codes reach into Marion County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 46077 also Boone and Hamilton counties
- 46107
- 46113 also Morgan and Hendricks counties
- 46163 also Hancock and Shelby counties
- 46183
- 46201
- 46202
- 46203
- 46204
- 46205
- 46206
- 46208
- 46214
- 46216
- 46217
- 46218
- 46219
- 46220
- 46221
- 46222
- 46224
- 46225
- 46226
- 46227
- 46228
- 46229 also Hancock County
- 46231 also Hendricks County
- 46234 also Hendricks County
- 46235
- 46236 also Hancock and Hamilton counties
- 46237
- 46239 also Hancock County
- 46240 also Hamilton County
- 46241
- 46250 also Hamilton County
- 46254
- 46256 also Hamilton County
- 46259 also Johnson and Shelby counties
- 46260 also Hamilton County
- 46268 also Boone and Hamilton counties
- 46278 also Hendricks County
Population of Marion County, 2020–2025
Marion County grew by 14,994 people (+1.5%) between April 2020 and July 2025: 25,166 more births than deaths and a net loss of 10,319 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 976,708 |
| 2021 | 971,373 |
| 2022 | 974,293 |
| 2023 | 980,327 |
| 2024 | 990,213 |
| 2025 | 992,196 |
Neighboring counties
- Hendricks County west · 193,510 people
- Hancock County east · 90,969 people
- Hamilton County north · 387,036 people
- Johnson County south · 174,262 people
- Boone County northwest · 80,689 people
- Morgan County southwest · 74,967 people
- Shelby County southeast · 45,882 people
Printable Marion County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (114 KB)
- PNG (2400 px) (78 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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