Clearlake, California demographics

Clearlake, CA demographics: median age 38.8; 7.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Clearlake city, California · Incorporated city · GEOID 0613945. The survey estimates a population of 16,659 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Clearlake is 38.8 years, with a 90% margin of error of 3.7 years. There are 6,088 households (±363). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	38.8 ±3.7	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 16,659
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	4,248 ±556	25.5% ±3.3 pp	22.0%	22.0%
18–34	3,546 ±490	21.3% ±2.9 pp	23.9%	22.8%
35–64	6,008 ±579	36.1% ±3.5 pp	38.5%	38.0%
65 and older	2,857 ±381	17.1% ±2.3 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 16,659
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	8,059 ±397	48.4% ±2.4 pp	49.9%	49.5%
Female	8,600 ±398	51.6% ±2.4 pp	50.1%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 16,659
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	9,542 ±873	57.3% ±5.2 pp	39.7%	61.0%
Black or African American alone	660 ±261	4.0% ±1.6 pp	5.4%	12.2%
American Indian and Alaska Native alone	312 ±216 · low precision	1.9% ±1.3 pp · low precision	1.3%	0.9%
Asian alone	212 ±170 · low precision	1.3% ±1.0 pp · low precision	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	3,298 ±704	19.8% ±4.2 pp	18.5%	7.1%
Two or more races	2,635 ±710	15.8% ±4.3 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 16,659
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	11,015 ±661	66.1% ±4.0 pp	59.8%	80.7%
Hispanic or Latino	5,644 ±663	33.9% ±4.0 pp	40.2%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 6,088
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	1,798 ±289	29.5% ±4.4 pp	48.4%	46.9%
Other family: male householder, no spouse present	613 ±201	10.1% ±3.2 pp	6.3%	5.1%
Other family: female householder, no spouse present	1,206 ±209	19.8% ±3.2 pp	13.1%	12.2%
Nonfamily: householder living alone	1,968 ±331	32.3% ±5.1 pp	24.3%	28.7%
Nonfamily: householder not living alone	503 ±173	8.3% ±2.8 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 6,088
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	1,820 ±240	29.9% ±3.5 pp	32.4%	29.5%
Households without people under 18	4,268 ±443	70.1% ±6.0 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 6,088
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	1,968 ±331	32.3% ±5.1 pp	24.3%	28.7%
Two-person households	1,784 ±343	29.3% ±5.4 pp	30.5%	33.8%
Three-person households	889 ±213	14.6% ±3.4 pp	16.7%	15.3%
Four-person households	795 ±202	13.1% ±3.2 pp	14.9%	12.6%
Five-person households	372 ±153	6.1% ±2.5 pp	7.7%	5.9%
Six-person households	128 ±65 · low precision	2.1% ±1.1 pp · low precision	3.3%	2.2%
Seven or more people	152 ±77 · low precision	2.5% ±1.3 pp · low precision	2.6%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 16,659
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	14,554 ±332	87.4% ±2.0 pp	73.0%	85.9%
Foreign born	2,105 ±334	12.6% ±2.0 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 15,977
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	11,835 ±681	74.1% ±4.1 pp	55.6%	77.7%
Spanish	3,800 ±707	23.8% ±4.4 pp	28.3%	13.6%
French, Haitian, or Cajun	13 ±21 · low precision	0.1% ±0.1 pp · low precision	0.4%	0.7%
German or other West Germanic	9 ±13 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	42 ±62 · low precision	0.3% ±0.4 pp · low precision	0.7%	0.7%
Other Indo-European	112 ±95 · low precision	0.7% ±0.6 pp · low precision	3.5%	2.0%
Korean	0 ±21 · low precision	0.0% ±0.1 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	11 ±20 · low precision	0.1% ±0.1 pp · low precision	3.5%	1.1%
Vietnamese	10 ±19 · low precision	0.1% ±0.1 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	35 ±39 · low precision	0.2% ±0.2 pp · low precision	2.1%	0.6%
Other Asian and Pacific Island	25 ±30 · low precision	0.2% ±0.2 pp · low precision	2.0%	1.1%
Arabic	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.6%	0.5%
Other and unspecified	85 ±99 · low precision	0.5% ±0.6 pp · low precision	0.6%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 11,270
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	2,251 ±383	20.0% ±3.3 pp	15.3%	10.4%
High school graduate or equivalency	3,691 ±439	32.8% ±3.6 pp	20.5%	26.0%
Some college, no degree	2,876 ±437	25.5% ±3.7 pp	19.3%	19.1%
Associate’s degree	1,558 ±361	13.8% ±3.1 pp	7.9%	8.8%
Bachelor’s degree	662 ±203	5.9% ±1.8 pp	22.7%	21.6%
Graduate or professional degree	232 ±124 · low precision	2.1% ±1.1 pp · low precision	14.4%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 16,428
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	14,515 ±635	88.4% ±3.8 pp	89.2%	87.7%
Moved within same county	1,063 ±362	6.5% ±2.2 pp	6.4%	6.3%
Moved from a different county in the same state	542 ±488 · low precision	3.3% ±3.0 pp · low precision	2.6%	3.1%
Moved from a different state	196 ±176 · low precision	1.2% ±1.1 pp · low precision	1.1%	2.3%
Moved from abroad	112 ±67 · low precision	0.7% ±0.4 pp · low precision	0.7%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

8.1% of Clearlake residents (±2.2 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 82.1% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Clearlake	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	8.1% ±2.2 pp	6.6%	8.4%	Not statistically different
Households with a broadband subscription Households	82.1% ±3.1 pp	93.5%	91.0%	Lower
Veterans Civilian population age 18 and older	5.5% ±1.8 pp	4.3%	6.2%	Not statistically different

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Clearlake . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Clearlake housing and cost context or return to the city profile.