Lafayette, California demographics

Lafayette, CA demographics: median age 45.7; 79.0% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Lafayette city, California · Incorporated city · GEOID 0639122. The survey estimates a population of 25,285 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Lafayette is 45.7 years, with a 90% margin of error of 1.4 years. There are 9,623 households (±331). 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	45.7 ±1.4	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 25,285
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	6,494 ±655	25.7% ±2.6 pp	22.0%	22.0%
18–34	2,753 ±405	10.9% ±1.6 pp	23.9%	22.8%
35–64	10,657 ±775	42.1% ±3.1 pp	38.5%	38.0%
65 and older	5,381 ±555	21.3% ±2.2 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 25,285
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	12,398 ±516	49.0% ±2.0 pp	49.9%	49.5%
Female	12,887 ±513	51.0% ±2.0 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: 25,285
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	18,488 ±845	73.1% ±3.3 pp	39.7%	61.0%
Black or African American alone	191 ±148 · low precision	0.8% ±0.6 pp · low precision	5.4%	12.2%
American Indian and Alaska Native alone	0 ±25 · low precision	0.0% ±0.1 pp · low precision	1.3%	0.9%
Asian alone	2,584 ±505	10.2% ±2.0 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	18 ±29 · low precision	0.1% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	225 ±148 · low precision	0.9% ±0.6 pp · low precision	18.5%	7.1%
Two or more races	3,779 ±718	14.9% ±2.8 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 25,285
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	23,257 ±544	92.0% ±2.1 pp	59.8%	80.7%
Hispanic or Latino	2,028 ±545	8.0% ±2.2 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: 9,623
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	6,429 ±356	66.8% ±2.9 pp	48.4%	46.9%
Other family: male householder, no spouse present	400 ±167	4.2% ±1.7 pp	6.3%	5.1%
Other family: female householder, no spouse present	633 ±172	6.6% ±1.8 pp	13.1%	12.2%
Nonfamily: householder living alone	1,809 ±377	18.8% ±3.9 pp	24.3%	28.7%
Nonfamily: householder not living alone	352 ±140	3.7% ±1.4 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 9,623
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	3,640 ±250	37.8% ±2.2 pp	32.4%	29.5%
Households without people under 18	5,983 ±458	62.2% ±4.3 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 9,623
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	1,809 ±377	18.8% ±3.9 pp	24.3%	28.7%
Two-person households	3,452 ±413	35.9% ±4.1 pp	30.5%	33.8%
Three-person households	1,726 ±299	17.9% ±3.0 pp	16.7%	15.3%
Four-person households	2,072 ±268	21.5% ±2.7 pp	14.9%	12.6%
Five-person households	515 ±120	5.4% ±1.2 pp	7.7%	5.9%
Six-person households	47 ±46 · low precision	0.5% ±0.5 pp · low precision	3.3%	2.2%
Seven or more people	2 ±41 · low precision	0.0% ±0.4 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: 25,285
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	21,743 ±591	86.0% ±2.3 pp	73.0%	85.9%
Foreign born	3,542 ±589	14.0% ±2.3 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 24,107
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	20,038 ±787	83.1% ±3.1 pp	55.6%	77.7%
Spanish	738 ±259	3.1% ±1.1 pp	28.3%	13.6%
French, Haitian, or Cajun	492 ±326 · low precision	2.0% ±1.4 pp · low precision	0.4%	0.7%
German or other West Germanic	238 ±148 · low precision	1.0% ±0.6 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	330 ±206 · low precision	1.4% ±0.9 pp · low precision	0.7%	0.7%
Other Indo-European	1,173 ±624 · low precision	4.9% ±2.6 pp · low precision	3.5%	2.0%
Korean	121 ±90 · low precision	0.5% ±0.4 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	330 ±170 · low precision	1.4% ±0.7 pp · low precision	3.5%	1.1%
Vietnamese	57 ±56 · low precision	0.2% ±0.2 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	246 ±199 · low precision	1.0% ±0.8 pp · low precision	2.1%	0.6%
Other Asian and Pacific Island	189 ±121 · low precision	0.8% ±0.5 pp · low precision	2.0%	1.1%
Arabic	35 ±53 · low precision	0.1% ±0.2 pp · low precision	0.6%	0.5%
Other and unspecified	120 ±111 · low precision	0.5% ±0.5 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: 17,589
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	171 ±108 · low precision	1.0% ±0.6 pp · low precision	15.3%	10.4%
High school graduate or equivalency	714 ±209	4.1% ±1.2 pp	20.5%	26.0%
Some college, no degree	1,697 ±340	9.6% ±1.9 pp	19.3%	19.1%
Associate’s degree	1,119 ±325	6.4% ±1.8 pp	7.9%	8.8%
Bachelor’s degree	7,241 ±484	41.2% ±2.5 pp	22.7%	21.6%
Graduate or professional degree	6,647 ±695	37.8% ±3.8 pp	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: 25,151
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	22,547 ±649	89.6% ±2.6 pp	89.2%	87.7%
Moved within same county	901 ±367	3.6% ±1.5 pp	6.4%	6.3%
Moved from a different county in the same state	883 ±343	3.5% ±1.4 pp	2.6%	3.1%
Moved from a different state	788 ±471 · low precision	3.1% ±1.9 pp · low precision	1.1%	2.3%
Moved from abroad	32 ±39 · low precision	0.1% ±0.2 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

0.8% of Lafayette residents (±0.6 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 98.5% 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	Lafayette	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	0.8% ±0.6 pp · low precision	6.6%	8.4%	Lower
Households with a broadband subscription Households	98.5% ±0.9 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	4.7% ±1.2 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 Lafayette . 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 Lafayette housing and cost context or return to the city profile.