Prince William County, Virginia
County seat: Manassas · Population 502,966 (2025) · 335 sq mi
Prince William County is the 2nd most populous of Virginia's 133 counties, with 502,966 people (2025 estimate). Its county seat is Manassas. It is part of the Northern Virginia Regional Commission (PD 8) region, one of the 21 Planning District Commissions of Virginia. The map shows its 4 cities and towns and the 7 neighboring counties.
Prince William County facts
- County seat
- Manassas
- Population (2025 estimate)
- 502,966 +4.3% since 2020
- Land area
- 335 sq mi 58th largest of 133
- Water area
- 12 sq mi
- Population density
- 1,500 per sq mi
- Established
- 1731
- Named after
- Prince William, Duke of Cumberland British Army general; (1721-1765)
- Largest city
- Dale City 71,016
- Median household income
- $131,402
- Cities and towns
- 4 plus 21 CDPs
- ZIP codes
- 19
- Time zone
- Eastern
- FIPS code
- 51153
Cities and towns in Prince William County
Prince William County has 4 incorporated cities, towns and villages. Populations count the people living inside Prince William County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Dumfries | Town | 6,405 | |
| Haymarket | Town | 1,602 | |
| Occoquan | Town | 1,078 | |
| Quantico | Town | 597 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Dale City | 71,016 | |
| Lake Ridge | 46,049 | |
| Woodbridge | 43,945 | |
| Linton Hall | 41,876 | |
| Cherry Hill | 26,044 | |
| Montclair | 22,387 | |
| Leesylvania | 21,632 | |
| Buckhall | 21,602 | |
| Sudley | 19,162 | |
| Gainesville | 18,196 | |
| Bull Run | 16,859 | |
| Independent Hill | 10,853 | |
| Triangle | 10,450 | |
| Yorkshire | 9,782 | |
| Potomac Mills | 5,741 | |
| Quantico Base | 5,594 | Stafford County |
| Loch Lomond | 4,606 | |
| County Center | 3,789 | |
| Bull Run Mountain Estates | 1,827 | |
| Nokesville | 1,226 | |
| Innovation | 1,034 |
ZIP codes in Prince William County
19 ZIP codes reach into Prince William County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 20109
- 20110 also Manassas city
- 20111 also Manassas Park city
- 20112
- 20119 also Fauquier County
- 20136
- 20137 also Fauquier County
- 20143
- 20155
- 20169 also Fauquier County
- 20181 also Fauquier County
- 22025
- 22026
- 22125
- 22134 also Stafford County
- 22172
- 22191
- 22192
- 22193
Population of Prince William County, 2020–2025
Prince William County grew by 20,761 people (+4.3%) between April 2020 and July 2025: 19,040 more births than deaths and a net gain of 1,153 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 482,838 |
| 2021 | 485,482 |
| 2022 | 487,524 |
| 2023 | 491,396 |
| 2024 | 498,352 |
| 2025 | 502,966 |
Neighboring counties
- Fairfax County northeast · 1,167,873 people
- Fauquier County west · 76,503 people
- Stafford County south · 170,803 people
- Manassas city north · 44,332 people
- Loudoun County north · 449,749 people
- Manassas Park city northeast · 16,560 people
- Charles County, Maryland southeast · 176,593 people
Printable Prince William 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) (167 KB)
- PNG (2400 px) (134 KB)
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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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