Miami County, Indiana
County seat: Peru · Population 34,487 (2025) · 374 sq mi
Miami County is the 47th most populous of Indiana's 92 counties, with 34,487 people (2025 estimate). Its county seat is Peru. It is part of the West Central (Region 4) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 6 cities and towns and the 5 neighboring counties.
Miami County facts
- County seat
- Peru
- Population (2025 estimate)
- 34,487 −4.1% since 2020
- Land area
- 374 sq mi 61st largest of 92
- Water area
- 4 sq mi
- Population density
- 92 per sq mi
- Established
- 1832
- Named after
- Miami people Native American nation originally found in what is now Indiana, Michigan, and Ohio
- Largest city
- Peru 10,962
- Median household income
- $61,139
- Cities and towns
- 6 plus 6 CDPs
- ZIP codes
- 14
- Time zone
- Eastern
- FIPS code
- 18103
Cities and towns in Miami County
Miami County has 6 incorporated cities, towns and villages. Populations count the people living inside Miami County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Peru (county seat) | City | 10,962 | |
| Converse | Town | 876 | Grant County |
| Bunker Hill | Town | 828 | |
| Denver | Town | 465 | |
| Amboy | Town | 309 | |
| Macy | Town | 194 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Grissom AFB | 2,977 | Cass County |
| Mexico | 906 | |
| Miami | 409 | |
| Bennetts Switch | 141 | |
| Chili | 48 | |
| North Grove | 8 |
ZIP codes in Miami County
14 ZIP codes reach into Miami County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 46901 also Howard and Cass counties
- 46910 also Fulton and Kosciusko counties
- 46911 also Wabash County
- 46914
- 46919 also Grant and Howard counties
- 46926 also Cass and Wabash counties
- 46932 also Cass, Howard and Carroll counties
- 46951 also Fulton County
- 46958
- 46959
- 46970 also Cass and Wabash counties
- 46971
- 46974 also Wabash County
- 46992 also Wabash County
Population of Miami County, 2020–2025
Miami County shrank by 1,473 people (−4.1%) between April 2020 and July 2025: 421 more deaths than births and a net loss of 1,004 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 35,907 |
| 2021 | 34,857 |
| 2022 | 34,211 |
| 2023 | 34,034 |
| 2024 | 34,465 |
| 2025 | 34,487 |
Neighboring counties
- Wabash County east · 30,713 people
- Cass County west · 37,836 people
- Fulton County northwest · 20,091 people
- Howard County south · 83,904 people
- Grant County southeast · 66,524 people
Printable Miami 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) (87 KB)
- PNG (2400 px) (70 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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