Franklin County, Pennsylvania
County seat: Chambersburg · Population 160,652 (2025) · 772 sq mi
Franklin County is the 22nd most populous of Pennsylvania's 67 counties, with 160,652 people (2025 estimate). Its county seat is Chambersburg. It is part of the District 8 region, one of the 11 PennDOT engineering districts. The map shows its 7 cities and towns and the 8 neighboring counties.
Franklin County facts
- County seat
- Chambersburg
- Population (2025 estimate)
- 160,652 +3% since 2020
- Land area
- 772 sq mi 27th largest of 67
- Water area
- 1 sq mi
- Population density
- 208 per sq mi
- Established
- 1784
- Same name
- One of 24 Franklin Counties in the US
- Named after
- Benjamin Franklin American polymath and statesman (1706–1790)
- Largest city
- Chambersburg 23,376
- Median household income
- $77,003
- Cities and towns
- 7 plus 10 CDPs
- ZIP codes
- 31
- Time zone
- Eastern
- FIPS code
- 42055
Cities and towns in Franklin County
Franklin County has 7 incorporated cities, towns and villages. Populations count the people living inside Franklin County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Chambersburg (county seat) | Borough | 23,376 | |
| Waynesboro | Borough | 11,190 | |
| Greencastle | Borough | 4,222 | |
| Mont Alto | Borough | 1,563 | |
| Mercersburg | Borough | 1,492 | |
| Shippensburg | Borough | 1,181 | Cumberland County |
| Orrstown | Borough | 210 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Guilford | 3,919 | |
| Wayne Heights | 3,293 | |
| State Line | 3,111 | |
| Fayetteville | 2,593 | |
| Scotland | 1,492 | |
| Pen Mar | 1,171 | |
| Blue Ridge Summit | 922 | |
| Marion | 878 | |
| Fort Loudon | 854 | |
| Rouzerville | 573 |
ZIP codes in Franklin County
31 ZIP codes reach into Franklin County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 17021 also Juniata, Perry and Huntingdon counties
- 17201
- 17202
- 17210
- 17214
- 17217
- 17219
- 17220
- 17221
- 17222 also Adams County
- 17224 also Fulton County
- 17225
- 17232
- 17235
- 17236 also Fulton County
- 17237
- 17240 also Cumberland County
- 17244
- 17246
- 17247
- 17250
- 17251
- 17252
- 17254
- 17257 also Cumberland County
- 17261
- 17262
- 17263
- 17265
- 17268
- 17271
Population of Franklin County, 2020–2025
Franklin County grew by 4,708 people (+3%) between April 2020 and July 2025: 781 more deaths than births and a net gain of 5,478 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 155,938 |
| 2021 | 156,597 |
| 2022 | 157,038 |
| 2023 | 158,181 |
| 2024 | 159,476 |
| 2025 | 160,652 |
Neighboring counties
- Washington County, Maryland south · 157,731 people
- Fulton County west · 14,483 people
- Cumberland County northeast · 277,270 people
- Huntingdon County north · 43,001 people
- Adams County east · 107,594 people
- Perry County northeast · 46,806 people
- Juniata County north · 23,403 people
- Frederick County, Maryland southeast · 302,883 people
Printable Franklin 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) (121 KB)
- PNG (2400 px) (109 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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