Sebastian, Florida demographics

Sebastian, FL demographics: median age 58.2; 27.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Sebastian city, Florida · Incorporated city · GEOID 1264825. The survey estimates a population of 26,262 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Sebastian is 58.2 years, with a 90% margin of error of 1.6 years. There are 11,586 households (±571). 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	58.2 ±1.6	42.6 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 26,262
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Under 18	3,313 ±515	12.6% ±2.0 pp	19.5%	22.0%
18–34	3,365 ±521	12.8% ±2.0 pp	20.7%	22.8%
35–64	9,919 ±835	37.8% ±3.2 pp	38.4%	38.0%
65 and older	9,665 ±777	36.8% ±3.0 pp	21.3%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 26,262
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Male	12,900 ±530	49.1% ±2.0 pp	49.1%	49.5%
Female	13,362 ±535	50.9% ±2.0 pp	50.9%	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: 26,262
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
White alone	22,066 ±769	84.0% ±2.9 pp	55.9%	61.0%
Black or African American alone	552 ±333 · low precision	2.1% ±1.3 pp · low precision	15.1%	12.2%
American Indian and Alaska Native alone	17 ±27 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.9%
Asian alone	466 ±293 · low precision	1.8% ±1.1 pp · low precision	2.9%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±28 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.2%
Some other race alone	539 ±220	2.1% ±0.8 pp	6.3%	7.1%
Two or more races	2,622 ±675	10.0% ±2.6 pp	19.4%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 26,262
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Not Hispanic or Latino	22,770 ±669	86.7% ±2.5 pp	72.6%	80.7%
Hispanic or Latino	3,492 ±670	13.3% ±2.6 pp	27.4%	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: 11,586
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Married-couple family	5,790 ±488	50.0% ±3.4 pp	46.7%	46.9%
Other family: male householder, no spouse present	562 ±214	4.9% ±1.8 pp	5.2%	5.1%
Other family: female householder, no spouse present	818 ±214	7.1% ±1.8 pp	12.7%	12.2%
Nonfamily: householder living alone	3,781 ±701	32.6% ±5.8 pp	28.3%	28.7%
Nonfamily: householder not living alone	635 ±164	5.5% ±1.4 pp	7.2%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 11,586
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Households with people under 18	1,742 ±286	15.0% ±2.4 pp	26.5%	29.5%
Households without people under 18	9,844 ±703	85.0% ±4.4 pp	73.5%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 11,586
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
One-person nonfamily households	3,781 ±701	32.6% ±5.8 pp	28.3%	28.7%
Two-person households	5,328 ±525	46.0% ±3.9 pp	36.6%	33.8%
Three-person households	999 ±190	8.6% ±1.6 pp	15.4%	15.3%
Four-person households	1,050 ±247	9.1% ±2.1 pp	11.6%	12.6%
Five-person households	328 ±149	2.8% ±1.3 pp	5.2%	5.9%
Six-person households	10 ±33 · low precision	0.1% ±0.3 pp · low precision	1.9%	2.2%
Seven or more people	90 ±71 · low precision	0.8% ±0.6 pp · low precision	1.1%	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: 26,262
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Native	24,147 ±463	91.9% ±1.8 pp	78.1%	85.9%
Foreign born	2,115 ±461	8.1% ±1.8 pp	21.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 25,382
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
English only	22,252 ±706	87.7% ±2.6 pp	69.4%	77.7%
Spanish	2,227 ±560	8.8% ±2.2 pp	22.6%	13.6%
French, Haitian, or Cajun	133 ±70 · low precision	0.5% ±0.3 pp · low precision	2.7%	0.7%
German or other West Germanic	88 ±89 · low precision	0.3% ±0.4 pp · low precision	0.4%	0.5%
Russian, Polish, or other Slavic	228 ±215 · low precision	0.9% ±0.8 pp · low precision	0.7%	0.7%
Other Indo-European	305 ±231 · low precision	1.2% ±0.9 pp · low precision	1.9%	2.0%
Korean	0 ±28 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±28 · low precision	0.0% ±0.1 pp · low precision	0.4%	1.1%
Vietnamese	27 ±42 · low precision	0.1% ±0.2 pp · low precision	0.3%	0.5%
Tagalog, including Filipino	0 ±28 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.6%
Other Asian and Pacific Island	122 ±132 · low precision	0.5% ±0.5 pp · low precision	0.5%	1.1%
Arabic	0 ±28 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.5%
Other and unspecified	0 ±28 · low precision	0.0% ±0.1 pp · low precision	0.4%	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: 21,833
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Less than high school graduate	2,205 ±461	10.1% ±2.1 pp	10.1%	10.4%
High school graduate or equivalency	6,564 ±802	30.1% ±3.6 pp	27.2%	26.0%
Some college, no degree	4,755 ±710	21.8% ±3.2 pp	18.5%	19.1%
Associate’s degree	2,402 ±484	11.0% ±2.2 pp	10.1%	8.8%
Bachelor’s degree	3,103 ±437	14.2% ±2.0 pp	21.3%	21.6%
Graduate or professional degree	2,804 ±566	12.8% ±2.6 pp	12.9%	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: 26,105
Category	Count ± MOE	Share ± MOE (pp)	Florida	U.S.
Same house	23,334 ±639	89.4% ±2.4 pp	86.3%	87.7%
Moved within same county	928 ±399	3.6% ±1.5 pp	6.6%	6.3%
Moved from a different county in the same state	668 ±330	2.6% ±1.3 pp	3.1%	3.1%
Moved from a different state	1,129 ±370	4.3% ±1.4 pp	2.9%	2.3%
Moved from abroad	46 ±54 · low precision	0.2% ±0.2 pp · low precision	1.1%	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

12.3% of Sebastian residents (±2.9 percentage points) had no health insurance coverage when surveyed, compared with 11.5% in Florida and 8.4% nationally. 90.7% 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	Sebastian	Florida	U.S.	Compared with Florida
People without health insurance Civilian noninstitutionalized population	12.3% ±2.9 pp	11.5%	8.4%	Not statistically different
Households with a broadband subscription Households	90.7% ±6.1 pp	91.6%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	9.7% ±1.5 pp	7.4%	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 Sebastian . 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 Sebastian housing and cost context or return to the city profile.