Rocklin, California demographics

Rocklin, CA demographics: median age 38.4; 48.0% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Rocklin city, California · Incorporated city · GEOID 0662364. The survey estimates a population of 73,327 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Rocklin is 38.4 years, with a 90% margin of error of 0.6 years. There are 25,951 households (±510). 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	38.4 ±0.6	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 73,327
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	18,053 ±1,011	24.6% ±1.4 pp	22.0%	22.0%
18–34	14,714 ±910	20.1% ±1.2 pp	23.9%	22.8%
35–64	30,079 ±1,213	41.0% ±1.7 pp	38.5%	38.0%
65 and older	10,481 ±656	14.3% ±0.9 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 73,327
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	36,263 ±804	49.5% ±1.1 pp	49.9%	49.5%
Female	37,064 ±803	50.5% ±1.1 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: 73,327
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	47,193 ±1,215	64.4% ±1.7 pp	39.7%	61.0%
Black or African American alone	1,097 ±399	1.5% ±0.5 pp	5.4%	12.2%
American Indian and Alaska Native alone	303 ±129	0.4% ±0.2 pp	1.3%	0.9%
Asian alone	8,473 ±955	11.6% ±1.3 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	86 ±68 · low precision	0.1% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	4,344 ±826	5.9% ±1.1 pp	18.5%	7.1%
Two or more races	11,831 ±1,075	16.1% ±1.5 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 73,327
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	61,584 ±1,032	84.0% ±1.4 pp	59.8%	80.7%
Hispanic or Latino	11,743 ±1,035	16.0% ±1.4 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: 25,951
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	15,400 ±550	59.3% ±1.8 pp	48.4%	46.9%
Other family: male householder, no spouse present	1,111 ±296	4.3% ±1.1 pp	6.3%	5.1%
Other family: female householder, no spouse present	2,219 ±330	8.6% ±1.3 pp	13.1%	12.2%
Nonfamily: householder living alone	5,407 ±411	20.8% ±1.5 pp	24.3%	28.7%
Nonfamily: householder not living alone	1,814 ±329	7.0% ±1.3 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 25,951
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	10,051 ±462	38.7% ±1.6 pp	32.4%	29.5%
Households without people under 18	15,900 ±746	61.3% ±2.6 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 25,951
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	5,407 ±411	20.8% ±1.5 pp	24.3%	28.7%
Two-person households	8,279 ±631	31.9% ±2.3 pp	30.5%	33.8%
Three-person households	4,808 ±535	18.5% ±2.0 pp	16.7%	15.3%
Four-person households	4,619 ±351	17.8% ±1.3 pp	14.9%	12.6%
Five-person households	2,003 ±332	7.7% ±1.3 pp	7.7%	5.9%
Six-person households	609 ±181	2.3% ±0.7 pp	3.3%	2.2%
Seven or more people	226 ±113	0.9% ±0.4 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: 73,327
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	62,854 ±1,073	85.7% ±1.5 pp	73.0%	85.9%
Foreign born	10,473 ±1,084	14.3% ±1.5 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 69,083
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	56,592 ±1,303	81.9% ±1.8 pp	55.6%	77.7%
Spanish	3,502 ±662	5.1% ±1.0 pp	28.3%	13.6%
French, Haitian, or Cajun	209 ±131 · low precision	0.3% ±0.2 pp · low precision	0.4%	0.7%
German or other West Germanic	276 ±191 · low precision	0.4% ±0.3 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	1,361 ±559	2.0% ±0.8 pp	0.7%	0.7%
Other Indo-European	2,256 ±539	3.3% ±0.8 pp	3.5%	2.0%
Korean	533 ±281 · low precision	0.8% ±0.4 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	1,068 ±422	1.5% ±0.6 pp	3.5%	1.1%
Vietnamese	265 ±179 · low precision	0.4% ±0.3 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	1,119 ±286	1.6% ±0.4 pp	2.1%	0.6%
Other Asian and Pacific Island	1,120 ±456	1.6% ±0.7 pp	2.0%	1.1%
Arabic	495 ±384 · low precision	0.7% ±0.6 pp · low precision	0.6%	0.5%
Other and unspecified	287 ±279 · low precision	0.4% ±0.4 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: 48,500
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	2,010 ±379	4.1% ±0.8 pp	15.3%	10.4%
High school graduate or equivalency	7,696 ±685	15.9% ±1.4 pp	20.5%	26.0%
Some college, no degree	10,226 ±813	21.1% ±1.6 pp	19.3%	19.1%
Associate’s degree	5,297 ±547	10.9% ±1.1 pp	7.9%	8.8%
Bachelor’s degree	15,225 ±951	31.4% ±1.9 pp	22.7%	21.6%
Graduate or professional degree	8,046 ±750	16.6% ±1.5 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: 72,561
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	63,147 ±1,120	87.0% ±1.5 pp	89.2%	87.7%
Moved within same county	4,024 ±732	5.5% ±1.0 pp	6.4%	6.3%
Moved from a different county in the same state	4,431 ±808	6.1% ±1.1 pp	2.6%	3.1%
Moved from a different state	572 ±255	0.8% ±0.4 pp	1.1%	2.3%
Moved from abroad	387 ±180	0.5% ±0.2 pp	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

2.6% of Rocklin residents (±0.5 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 96.5% 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	Rocklin	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	2.6% ±0.5 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	96.5% ±1.2 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	5.6% ±0.6 pp	4.3%	6.2%	Higher

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