Demographics of Seaside city, California

Seaside city, California had 31,636 people on July 1, 2025, by the Census Bureau’s estimate: −692 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Seaside city, in four figures

31,636
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 31,814 ±40.; −2.1%
Change since July 2020: −692 people.; 34.0 ±1.5
Median age: ACS 2020–⁠2024.; $85,311 ±$5,518
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Seaside city, California's population shrank 2.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Seaside city, 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 — incorporated places and New England towns

About this chart

The figures

Seaside city, California's population shrank 2.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Seaside city, 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	32,328	100.0	100.0
2021	32,031	99.1	100.2
2022	31,565	97.6	100.7
2023	31,446	97.3	101.6
2024	31,306	96.8	102.5
2025	31,636	97.9	103.1

Population of Seaside city, California on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	32,328	—
2021	32,031	−297
2022	31,565	−466
2023	31,446	−119
2024	31,306	−140
2025	31,636	+330

Age, 2020–2024

The median age is 34.0 ±1.5: for men 33.9 ±2.3 and for women 34.0 ±1.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Seaside city by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	1,594 ±274	5.0% ±0.9	5.5% ±<0.1	5.6% ±<0.1
5 to 17	5,353 ±530	16.8% ±1.7	16.5% ±<0.1	16.3% ±<0.1
18 to 24	4,185 ±541	13.2% ±1.7	9.1% ±<0.1	9.1% ±<0.1
25 to 44	9,484 ±685	29.8% ±2.2	28.7% ±<0.1	26.9% ±<0.1
45 to 64	7,139 ±622	22.4% ±2.0	24.6% ±<0.1	24.8% ±<0.1
65 and over	4,059 ±433	12.8% ±1.4	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $85,311 ±$5,518, and income per person $34,196 ±$2,397, 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 Seaside city by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	1,107 ±246	10.7% ±2.3	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	1,872 ±402	18.1% ±3.8	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	1,708 ±303	16.5% ±2.8	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	1,676 ±319	16.2% ±3.0	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	1,919 ±308	18.5% ±2.9	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	935 ±204	9.0% ±1.9	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	1,154 ±257	11.1% ±2.4	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 Seaside city by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	4,848 ±760	16.0% ±2.5	12.0% ±0.1	12.5% ±0.1
Under 18	1,718 ±367	25.1% ±4.9	15.0% ±0.1	16.1% ±0.1
18 to 59	2,192 ±352	12.4% ±1.9	11.0% ±0.1	11.6% ±0.1
60 and over	938 ±257	16.2% ±4.1	11.5% ±0.1	11.0% ±<0.1

Housing, 2020–2024

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Housing in Seaside city, ACS 2020–2024
Measure	Seaside city	California	United States
Housing units	10,853 ±473	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	95.6% ±0.5	92.5% ±0.1	89.9% ±0.1
Vacant	4.4% ±1.6	7.5% ±0.1	10.1% ±0.1
Owner occupied	35.4% ±3.3	55.9% ±0.3	65.2% ±0.3
Renter occupied	64.6% ±2.9	44.1% ±0.2	34.8% ±0.1
Median home value	$787,100 ±$32,964	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	$2,409 ±$116	$2,036 ±$5	$1,413 ±$2
Median year built	1968 ±2	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 Seaside city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	15,343 ±833	48.2% ±2.6	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	9,350 ±676	29.4% ±2.1	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	1,487 ±373	4.7% ±1.2	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	3,002 ±575	9.4% ±1.8	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 15	0% to < 0.1%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	494 ±219	1.6% ±0.7	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	68 to 348	0.2% to 1.1%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,925 ±385	6.1% ±1.2	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 Seaside city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	15,561 ±1,077	48.9% ±3.4	56.5% ±0.1	57.3% ±<0.1
Born in another state	6,999 ±857	22.0% ±2.7	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	916 ±336	2.9% ±1.1	1.5% ±<0.1	1.7% ±<0.1
Born abroad	8,338 ±747	26.2% ±2.3	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	2,993 ±530	9.4% ±1.7	14.7% ±0.1	7.4% ±<0.1
Not citizens	5,345 ±630	16.8% ±2.0	12.3% ±0.1	6.8% ±<0.1

Seaside city among the places of California

256th of 661 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the California page.

Places of California near Seaside city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Goleta city	32,685 ±44
Bell city	32,476 ±39
Atwater city	32,162 ±43
Fallbrook CDP	32,112 ±2,062
Spring Valley CDP (San Diego County)	31,969 ±2,236
Seaside city	31,814 ±40
San Pablo city	31,720 ±42
Beverly Hills city	31,624 ±30
Orcutt CDP	31,454 ±1,864
El Paso de Robles (Paso Robles) city	31,446 ±51
Santa Paula city	31,376 ±31

Elsewhere on the site

Reported crime in Seaside city, California

Sources

Census Bureau population estimates — incorporated places and New England towns — 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