Demographics of Sebastian, Florida

The U.S. Census Bureau American Community Survey (ACS) 2023 places Sebastian's total population at 25,759, with a median age of 57.6 — a figure roughly 15 years above the Florida state median and more than 20 years above the national median. The median household income stands at $68,863, and the median home value is $281,700, within a housing stock characterized by a high owner-occupancy rate of 83.5%. These four indicators collectively describe a small, largely settled, owner-occupied city whose demographic profile is shaped primarily by its substantial retiree population.

Sebastian is located in Indian River County on Florida's Treasure Coast, situated along the western shore of the Indian River Lagoon. Its population size places it among the larger incorporated municipalities in the county, while its age structure sets it apart from most Florida cities of comparable size.

Sebastian's total population of 25,759, as reported by the U.S. Census Bureau ACS 2023, is distributed across 11,512 households in a city incorporated in 1923. The median age of 57.6 is the single most diagnostic figure in Sebastian's demographic profile. For context, Florida's statewide median age is approximately 42.0 and the national median is approximately 38.9. Sebastian's figure exceeds both by a substantial margin, placing the city firmly among Florida's most age-skewed communities — a pattern common to smaller Treasure Coast cities that have historically attracted retirees from the Northeast and Midwest.

The age structure has direct implications for nearly every other demographic variable: labor force participation, household composition, healthcare demand, and the character of community life all reflect a population in which a large share of residents have moved past typical working years. The Scout Cities economic profile notes that the city's large retiree population is a documented driver of healthcare and social assistance sector growth in the local economy. The Sebastian River Area Chamber of Commerce traces the city's origins to a fishing village established in the early 1880s, and the community's evolution from a working waterfront settlement to a predominantly residential, retirement-oriented city is reflected in its current age profile.

The gap between Sebastian's median age and Florida's is not merely statistical — it signals that conventional age-structure assumptions about workforce size, school-age population, and housing demand apply differently here than in younger metropolitan areas. With a labor force participation rate of just 51.4%, well below the national norm of approximately 62–63%, a substantial portion of the adult population is outside the labor market entirely, consistent with retirement rather than structural unemployment.

The U.S. Census Bureau ACS 2023 reports a median household income of $68,863 for Sebastian. This figure sits modestly below the Florida statewide median of approximately $67,000–$70,000 and below the national median of approximately $77,700, though comparisons require care given Sebastian's distinct age structure. Retired households frequently report lower cash income than working households even when their total financial resources — retirement savings, investment income, Social Security — are substantial. The median household income figure thus reflects the income composition of a retirement-heavy population rather than necessarily indicating lower lifetime wealth accumulation.

The city's poverty rate stands at 9.4%, according to the same ACS data. This figure is consistent with a mixed-income community that includes both modestly resourced fixed-income retirees and higher-income households that have relocated for quality-of-life reasons. The Scout Cities profile identifies tourism and hospitality and healthcare and social assistance as primary economic sectors, both of which tend to encompass a wide income distribution — from service-sector workers earning near-median wages to healthcare professionals earning substantially more.

The relationship between income and housing in Sebastian is also notable: a median home value of $281,700 against a median household income of $68,863 produces a price-to-income ratio of approximately 4.1, a figure that places moderate pressure on income-qualified buyers, particularly first-time purchasers and lower-income renters. The median gross rent of $1,414 per month, representing an annualized rental cost of approximately $16,968, is a significant share of the median household income for renter households, which the ACS identifies as 16.5% of occupied units.

Sebastian's housing inventory totals 12,891 units across 11,512 occupied households, according to the U.S. Census Bureau ACS 2023. The difference between total units and occupied households — approximately 1,379 units — represents a vacancy margin that may include seasonal dwellings, units under renovation, or properties held off market, a pattern common to Florida communities that attract part-year residents. Owner-occupied units account for 83.5% of the occupied stock, and renter-occupied units account for the remaining 16.5%. This ownership rate is considerably higher than the Florida statewide owner-occupancy rate of approximately 66–68%, reflecting both the demographic character of an older, settled population and the historically lower transience associated with retirement destinations.

The median home value of $281,700 positions Sebastian within the middle tier of Indian River County's housing market. Nationally, the median home value is approximately $310,000, placing Sebastian modestly below the national figure. The median gross rent of $1,414 per month applies to the renter sector, which — at 16.5% of occupied units — is proportionally small but represents a meaningful segment of the housing market, particularly for younger residents, service-sector workers, and those who have not yet accumulated equity.

The City of Sebastian has been investing in its waterfront real estate and public infrastructure in ways that intersect with housing context. The Riverfront CRA Annual Report 2024 documents the completion of the Working Waterfront Shoreline Protection and Commercial Fishing Distribution Center, and the City Council approved in January 2026 a Riverview Park renovation exceeding $3,000,000 in total project budget, as reported by WQCS. These investments in public amenity infrastructure adjacent to the waterfront have potential relevance to property values in nearby residential areas, though the ACS data reflects conditions as of 2023.

The U.S. Census Bureau ACS 2023 reports a labor force participation rate of 51.4% for Sebastian — substantially below the national participation rate of approximately 62–63% for the civilian noninstitutional population. This gap is primarily attributable to the city's age structure: a community with a median age of 57.6 contains a large proportion of residents who have exited the labor market through retirement and are therefore not counted as either employed or unemployed in labor force statistics. The reported unemployment rate of 8.5%, while notable in absolute terms, must be interpreted in this context — the denominator (those in the labor force) is relatively small, so even a modest number of unemployed individuals produces a higher percentage.

The industry composition documented for Sebastian by Scout Cities identifies tourism and hospitality, healthcare and social assistance, and marine industries as the primary economic drivers. The healthcare sector's prominence is directly connected to the retiree demographic: a large, aging residential population generates sustained demand for medical services, home health aides, assisted living facilities, and related social assistance. The Florida State Parks Foundation documents that Sebastian Inlet State Park alone generates an economic impact of $74,626,805 annually and supports 1,045 local jobs — figures that underscore how significantly the tourism and recreation sector contributes to the local employment base.

The marine economy connects Sebastian's labor market to its historical roots as a fishing village. The Riverfront CRA Annual Report 2024 documents the completion of a Commercial Fishing Distribution Center as part of the Working Waterfront project — an investment that reflects a continuing, if numerically smaller, commercial fishing sector operating alongside the dominant tourism and healthcare industries. The Sebastian Inlet District describes the inlet as a $1.1 billion regional economic driver, connecting the Indian River Lagoon to the Atlantic Ocean and supporting fishing, boating, and water-sports activity that sustains portions of the local workforce.

The U.S. Census Bureau ACS 2023 reports that 16.9% of Sebastian residents hold a bachelor's degree or higher. This figure is considerably below the Florida statewide rate of approximately 31–32% and the national rate of approximately 35–36%, placing Sebastian in the lower tier of educational attainment among Florida's incorporated cities when measured by this single indicator. As with income and labor force participation, the age structure of the community is relevant context: residents who completed their formal education during decades when college attendance rates were nationally lower — the 1950s through 1970s — are a large share of Sebastian's adult population, and their lower rates of degree attainment reflect the historical norms of those eras rather than current community investment in education.

The ACS educational attainment measure captures the highest credential earned and does not distinguish between associate's degrees, vocational certifications, or partial college attendance. In a community oriented toward marine trades, fishing, construction, and service-sector employment, credential pathways other than four-year degrees are likely to be well represented, though the ACS data available for Sebastian does not break these figures out in the current brief.

At the K–12 level, Sebastian's schools received attention in late 2024 when Indian River County awarded Purple Star designations to three Sebastian schools in December of that year, according to Vero News. The Purple Star designation recognizes schools that demonstrate a commitment to serving military-connected students and families — a designation that reflects the presence of military-affiliated households within the broader school population, consistent with Sebastian's proximity to military installations along Florida's east coast.

All headline demographic figures on this page — total population, median age, median household income, median home value, housing units, household counts, owner- and renter-occupancy rates, poverty rate, unemployment rate, labor force participation rate, educational attainment, and median gross rent — are drawn from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates for 2023, the most current publicly available small-area demographic dataset as of the publication date of April 30, 2026. The ACS is a continuous survey conducted by the Census Bureau; its 5-year estimates aggregate data collected over a 60-month period to produce statistically reliable figures for geographies as small as census tracts and incorporated places. Figures are subject to margins of error inherent to survey sampling; for a city the size of Sebastian, most estimates carry moderate margins of error that do not materially affect interpretation at the level of precision used here.

State and national comparator figures cited in comparison rows — Florida median age (~42.0), U.S. median age (~38.9), Florida median household income (~$67,900), U.S. median household income (~$77,700), Florida bachelor's degree attainment (~31.5%), and U.S. bachelor's degree attainment (~35.5%) — are approximate values drawn from publicly available ACS summary data and are presented as order-of-magnitude reference points to contextualize Sebastian's figures. They are marked with a tilde (~) to indicate approximation.

Contextual information about Sebastian's history, economy, civic structure, and local institutions is drawn from sources cited individually in the body text, including the Sebastian River Area Chamber of Commerce, the Sebastian Inlet District, the Florida State Parks Foundation, the City of Sebastian Riverfront CRA Annual Report 2024, Scout Cities, and local news sources including WQCS and Vero News. No figures are extrapolated, predicted, or editorially adjusted; all values appear as documented in the cited sources.