Demographics of Plumas County, California

Plumas County, California had 18,583 people on July 1, 2025, by the Census Bureau’s estimate: −1,162 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Plumas County, in four figures

18,583
Population: July 1, 2025, Vintage 2025 estimate.; −5.9%
Change since July 2020: −1,162 people.; 52.0 ±1.0
Median age: ACS 2020–⁠2024.; $66,031 ±$6,182
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Plumas County, California's population shrank 5.9% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Plumas County, California's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Plumas County, California's population shrank 5.9% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Plumas County, California's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	19,745	100.0	100.0
2021	19,984	101.2	100.2
2022	19,396	98.2	100.7
2023	19,088	96.7	101.6
2024	18,773	95.1	102.5
2025	18,583	94.1	103.1

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Population of Plumas County, California on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	19,745	−49	−40	0	−10
2021	19,984	+239	−101	+2	+370
2022	19,396	−588	−108	+19	−512
2023	19,088	−308	−77	+24	−261
2024	18,773	−315	−124	+46	−242
2025	18,583	−190	−133	+19	−78

Age, 2020–2024

The median age is 52.0 ±1.0: for men 51.5 ±1.3 and for women 53.1 ±2.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Plumas County by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	844 ±139	4.3% ±0.7	5.5% ±<0.1	5.6% ±<0.1
5 to 17	2,492 ±362	12.8% ±1.9	16.5% ±<0.1	16.3% ±<0.1
18 to 24	907 ±227	4.7% ±1.2	9.1% ±<0.1	9.1% ±<0.1
25 to 44	4,101 ±400	21.1% ±2.1	28.7% ±<0.1	26.9% ±<0.1
45 to 64	4,965 ±448	25.6% ±2.3	24.6% ±<0.1	24.8% ±<0.1
65 and over	6,114 ±511	31.5% ±2.6	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $66,031 ±$6,182, and income per person $43,235 ±$3,857, in 2024 dollars. The median is $99,122 ±$310 in California and $80,734 ±$166 in the United States.

Households by income

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Households in Plumas County by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	1,355 ±326	16.8% ±4.0	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	1,759 ±359	21.8% ±4.4	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	1,330 ±308	16.5% ±3.8	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	856 ±191	10.6% ±2.3	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	1,470 ±341	18.3% ±4.2	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	465 ±151	5.8% ±1.9	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	819 ±247	10.2% ±3.0	20.5% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Plumas County by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	2,036 ±536	10.6% ±2.8	12.0% ±0.1	12.5% ±0.1
Under 18	252 to 750	15.1% ±7.3	15.0% ±0.1	16.1% ±0.1
18 to 59	839 ±251	10.3% ±3.0	11.0% ±0.1	11.6% ±0.1
60 and over	696 ±195	8.9% ±2.5	11.5% ±0.1	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Plumas County, ACS 2020–2024
Measure	Plumas County	California	United States
Housing units	14,921 ±29	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	54.0% ±2.3	92.5% ±0.1	89.9% ±0.1
Vacant	46.0% ±2.3	7.5% ±0.1	10.1% ±0.1
Owner occupied	74.6% ±3.7	55.9% ±0.3	65.2% ±0.3
Renter occupied	25.4% ±4.2	44.1% ±0.2	34.8% ±0.1
Median home value	$360,200 ±$19,837	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	$1,194 ±$85	$2,036 ±$5	$1,413 ±$2
Median year built	1981 ±3	1976 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Plumas County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	1,998 ±0	10.3% ±<0.1	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	15,700 ±148	80.8% ±0.8	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	187 ±91	1.0% ±0.5	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	22 to 284	0.1% to 1.5%	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	144 to 438	0.7% to 2.3%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 8	0% to < 0.1%	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	13 to 127	0.1% to 0.7%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,023 ±218	5.3% ±1.1	4.4% ±<0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Plumas County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	13,061 ±628	67.2% ±3.2	56.5% ±0.1	57.3% ±<0.1
Born in another state	5,264 ±567	27.1% ±2.9	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	54 to 268	0.3% to 1.4%	1.5% ±<0.1	1.7% ±<0.1
Born abroad	937 ±325	4.8% ±1.7	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	674 ±251	3.5% ±1.3	14.7% ±0.1	7.4% ±<0.1
Not citizens	263 ±125	1.4% ±0.6	12.3% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Plumas County among the counties of California

51st of 58 by population, July 2025. Every one is listed on the California page.

Counties of California near Plumas County in population, July 2025
County	July 2025	Change since 2020
Amador County	41,876	+3.2%
Glenn County	28,141	−2.6%
Lassen County	28,117	−13.1%
Del Norte County	26,410	−4.4%
Colusa County	21,836	−0.1%
Plumas County	18,583	−5.9%
Inyo County	18,158	−4.4%
Mariposa County	16,918	−1.2%
Trinity County	15,720	−2.4%
Mono County	12,505	−5.4%
Modoc County	8,426	−2.9%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026