Plumas County, California
County seat: Quincy · Population 18,583 (2025) · 2,553 sq mi
Plumas County is the 51st most populous of California's 58 counties, with 18,583 people (2025 estimate). Its county seat is Quincy. The map shows its 1 city or town and the 6 neighboring counties.
Plumas County facts
- County seat
- Quincy
- Population (2025 estimate)
- 18,583 −6.1% since 2020
- Land area
- 2,553 sq mi 22nd largest of 58
- Water area
- 60 sq mi
- Population density
- 7 per sq mi
- Established
- 1854
- Named after
- Feather River the principal tributary of the Sacramento River in California
- Largest city
- East Quincy 2,723
- Median household income
- $66,031
- Cities and towns
- 1 plus 45 CDPs
- ZIP codes
- 18
- Time zone
- Pacific
- FIPS code
- 06063
Cities and towns in Plumas County
Plumas County has 1 incorporated place. Populations count the people living inside Plumas County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Portola | City | 2,024 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| East Quincy | 2,723 | |
| Chester | 1,759 | |
| Quincy | 1,317 | |
| Delleker | 724 | |
| Chilcoot-Vinton | 686 | |
| Graeagle | 496 | |
| Hamilton Branch | 480 | |
| Lake Almanor Country Club | 469 | |
| Lake Almanor West | 463 | |
| Iron Horse | 434 | |
| Greenville | 424 | |
| Lake Almanor Peninsula | 412 | |
| Beckwourth | 388 | |
| Plumas Eureka | 372 | |
| Meadow Valley | 363 | |
| Greenhorn | 243 | |
| Cromberg | 154 | |
| East Shore | 142 | |
| Gold Mountain | 124 | |
| Mabie | 107 | |
| Clio | 91 | |
| Crescent Mills | 63 | |
| Prattville | 57 | |
| La Porte | 53 | |
| Keddie | 48 | |
| Mohawk Vista | 48 | |
| Valley Ranch | 46 | |
| Whitehawk | 39 | |
| Twain | 31 | |
| Bucks Lake | 20 | |
| Canyondam | 11 | |
| Little Grass Valley | 10 | |
| Almanor | 0 | |
| Belden | 0 | |
| Blairsden | 0 | |
| C-Road | 0 | |
| Caribou | 0 | |
| Indian Falls | 0 | |
| Johnsville | 0 | |
| Lake Davis | 0 | |
| Paxton | 0 | |
| Spring Garden | 0 | |
| Taylorsville | 0 | |
| Tobin | 0 | |
| Warner Valley | 0 |
ZIP codes in Plumas County
18 ZIP codes reach into Plumas County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 95915
- 95923
- 95934
- 95947
- 95956
- 95971
- 95981 also Yuba County
- 95983
- 95984
- 96020
- 96103
- 96105 also Sierra and Lassen counties
- 96106
- 96118 also Sierra County
- 96122
- 96129
- 96135
- 96137 also Lassen County
Population of Plumas County, 2020–2025
Plumas County shrank by 1,211 people (−6.1%) between April 2020 and July 2025: 583 more deaths than births and a net loss of 623 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 19,745 |
| 2021 | 19,984 |
| 2022 | 19,396 |
| 2023 | 19,088 |
| 2024 | 18,773 |
| 2025 | 18,583 |
Neighboring counties
- Lassen County north · 28,117 people
- Butte County southwest · 209,211 people
- Sierra County southeast · 3,098 people
- Tehama County west · 64,665 people
- Shasta County northwest · 181,648 people
- Yuba County southwest · 88,691 people
Printable Plumas 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) (107 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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