Greenfield, California demographics

Greenfield, CA demographics: median age 28.8; 8.4% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Greenfield city, California · Incorporated city · GEOID 0630994. The survey estimates a population of 20,232 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Greenfield is 28.8 years, with a 90% margin of error of 2.2 years. There are 4,426 households (±240). 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	28.8 ±2.2	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 20,232
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	7,213 ±752	35.7% ±3.7 pp	22.0%	22.0%
18–34	4,793 ±532	23.7% ±2.6 pp	23.9%	22.8%
35–64	6,452 ±615	31.9% ±3.0 pp	38.5%	38.0%
65 and older	1,774 ±328	8.8% ±1.6 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 20,232
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	10,176 ±513	50.3% ±2.5 pp	49.9%	49.5%
Female	10,056 ±515	49.7% ±2.5 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: 20,232
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	3,224 ±1,039	15.9% ±5.1 pp	39.7%	61.0%
Black or African American alone	197 ±147 · low precision	1.0% ±0.7 pp · low precision	5.4%	12.2%
American Indian and Alaska Native alone	262 ±194 · low precision	1.3% ±1.0 pp · low precision	1.3%	0.9%
Asian alone	155 ±91 · low precision	0.8% ±0.4 pp · low precision	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±25 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	13,151 ±1,243	65.0% ±6.1 pp	18.5%	7.1%
Two or more races	3,243 ±892	16.0% ±4.4 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 20,232
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	793 ±252	3.9% ±1.2 pp	59.8%	80.7%
Hispanic or Latino	19,439 ±258	96.1% ±1.3 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: 4,426
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	2,473 ±289	55.9% ±5.8 pp	48.4%	46.9%
Other family: male householder, no spouse present	499 ±176	11.3% ±3.9 pp	6.3%	5.1%
Other family: female householder, no spouse present	1,017 ±233	23.0% ±5.1 pp	13.1%	12.2%
Nonfamily: householder living alone	306 ±131	6.9% ±2.9 pp	24.3%	28.7%
Nonfamily: householder not living alone	131 ±83 · low precision	3.0% ±1.9 pp · low precision	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 4,426
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	2,761 ±225	62.4% ±3.8 pp	32.4%	29.5%
Households without people under 18	1,665 ±288	37.6% ±6.2 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 4,426
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	306 ±131	6.9% ±2.9 pp	24.3%	28.7%
Two-person households	596 ±181	13.5% ±4.0 pp	30.5%	33.8%
Three-person households	604 ±188	13.6% ±4.2 pp	16.7%	15.3%
Four-person households	986 ±250	22.3% ±5.5 pp	14.9%	12.6%
Five-person households	768 ±230	17.4% ±5.1 pp	7.7%	5.9%
Six-person households	536 ±187	12.1% ±4.2 pp	3.3%	2.2%
Seven or more people	630 ±190	14.2% ±4.2 pp	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: 20,232
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	11,460 ±824	56.6% ±4.1 pp	73.0%	85.9%
Foreign born	8,772 ±822	43.4% ±4.1 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 18,201
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	3,064 ±672	16.8% ±3.7 pp	55.6%	77.7%
Spanish	14,722 ±875	80.9% ±4.4 pp	28.3%	13.6%
French, Haitian, or Cajun	0 ±25 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.7%
German or other West Germanic	9 ±15 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	0 ±25 · low precision	0.0% ±0.1 pp · low precision	0.7%	0.7%
Other Indo-European	0 ±25 · low precision	0.0% ±0.1 pp · low precision	3.5%	2.0%
Korean	11 ±18 · low precision	0.1% ±0.1 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	0 ±25 · low precision	0.0% ±0.1 pp · low precision	3.5%	1.1%
Vietnamese	0 ±25 · low precision	0.0% ±0.1 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	64 ±53 · low precision	0.4% ±0.3 pp · low precision	2.1%	0.6%
Other Asian and Pacific Island	20 ±33 · low precision	0.1% ±0.2 pp · low precision	2.0%	1.1%
Arabic	0 ±25 · low precision	0.0% ±0.1 pp · low precision	0.6%	0.5%
Other and unspecified	311 ±316 · low precision	1.7% ±1.7 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: 11,062
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	5,522 ±717	49.9% ±6.0 pp	15.3%	10.4%
High school graduate or equivalency	2,805 ±480	25.4% ±4.1 pp	20.5%	26.0%
Some college, no degree	1,235 ±296	11.2% ±2.6 pp	19.3%	19.1%
Associate’s degree	569 ±200	5.1% ±1.8 pp	7.9%	8.8%
Bachelor’s degree	848 ±266	7.7% ±2.4 pp	22.7%	21.6%
Graduate or professional degree	83 ±63 · low precision	0.8% ±0.6 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: 19,894
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	18,882 ±642	94.9% ±3.1 pp	89.2%	87.7%
Moved within same county	797 ±524 · low precision	4.0% ±2.6 pp · low precision	6.4%	6.3%
Moved from a different county in the same state	10 ±16 · low precision	0.1% ±0.1 pp · low precision	2.6%	3.1%
Moved from a different state	4 ±8 · low precision	0.0% ±0.0 pp · low precision	1.1%	2.3%
Moved from abroad	201 ±256 · low precision	1.0% ±1.3 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

10.6% of Greenfield residents (±2.3 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 95.0% 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	Greenfield	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	10.6% ±2.3 pp	6.6%	8.4%	Higher
Households with a broadband subscription Households	95.0% ±1.9 pp	93.5%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	1.7% ±0.9 pp · low precision	4.3%	6.2%	Lower

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 Greenfield . 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 Greenfield housing and cost context or return to the city profile.