Putnam County, Indiana
County seat: Greencastle · Population 37,876 (2025) · 481 sq mi
Putnam County is the 40th most populous of Indiana's 92 counties, with 37,876 people (2025 estimate). Its county seat is Greencastle. It is part of the Western (Region 7) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 6 cities and towns and the 6 neighboring counties.
Putnam County facts
- County seat
- Greencastle
- Population (2025 estimate)
- 37,876 +3.1% since 2020
- Land area
- 481 sq mi 15th largest of 92
- Water area
- 2 sq mi
- Population density
- 79 per sq mi
- Established
- 1822
- Named after
- Israel Putnam American Revolutionary War general (1718–1790)
- Largest city
- Greencastle 9,924
- Median household income
- $78,378
- Cities and towns
- 6 plus 4 CDPs
- ZIP codes
- 16
- Time zone
- Eastern
- FIPS code
- 18133
Cities and towns in Putnam County
Putnam County has 6 incorporated cities, towns and villages. Populations count the people living inside Putnam County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Greencastle (county seat) | City | 9,924 | |
| Cloverdale | Town | 2,174 | |
| Roachdale | Town | 865 | |
| Bainbridge | Town | 707 | |
| Fillmore | Town | 553 | |
| Russellville | Town | 313 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Heritage Lake | 3,227 | |
| Putnamville | 1,959 | |
| Van Bibber Lake | 658 | |
| Groveland | 209 |
ZIP codes in Putnam County
16 ZIP codes reach into Putnam County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 46105
- 46120 also Owen and Morgan counties
- 46121 also Hendricks County
- 46128
- 46135 also Parke County
- 46165 also Hendricks County
- 46170
- 46171 also Clay County
- 46172 also Montgomery County
- 46175 also Parke County
- 47456 also Owen and Morgan counties
- 47840 also Clay County
- 47868 also Owen and Clay counties
- 47872 also Parke County
- 47954 also Montgomery County
- 47989 also Montgomery and Parke counties
Population of Putnam County, 2020–2025
Putnam County grew by 1,141 people (+3.1%) between April 2020 and July 2025: 393 more deaths than births and a net gain of 1,547 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 36,696 |
| 2021 | 37,026 |
| 2022 | 37,107 |
| 2023 | 37,200 |
| 2024 | 37,758 |
| 2025 | 37,876 |
Neighboring counties
- Hendricks County east · 193,510 people
- Parke County west · 16,642 people
- Montgomery County north · 38,954 people
- Owen County south · 21,886 people
- Morgan County southeast · 74,967 people
- Clay County southwest · 26,410 people
Printable Putnam 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) (94 KB)
- PNG (2400 px) (75 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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