Sebastian, Florida Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Sebastian, FL Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around average
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C
Income Below average
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D
Education Well below average
Source: Map AI Methodology
Population
| Metric | Sebastian | Florida Avg | U.S. Average |
|---|---|---|---|
| Population | 20,544 | 22,388,905 | 337,468,954 |
| Population density (per sq mi) | 1127.7 | 313.4 | 86.4 |
| Population growth (%/yr) | 1.68% | 1.47% | 0.59% |
| Median age | 56.9 | 40.2 | 37.3 |
| Households | 9,244 | 8,743,019 | 130,235,071 |
Population in Sebastian grew by 36.2% from 2009 to 2024, reaching 20,544 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Sebastian is Boomers, aged 61–79, at 32.0% of residents. That is 12.4 points above Florida as a whole.
- Gen Z 13–28 2,480 12.1% -7.3 pts
- Millennials 29–44 2,758 13.4% -7.2 pts
- Gen X 45–60 4,844 23.6% +2.9 pts
- Boomers 61–79 6,571 32.0% +12.4 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Florida, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 51.4% of the people living in Sebastian and men 48.6%.
- Women 51.4% Florida 51.0%
- Men 48.6% Florida 49.0%
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Economy
Sebastian has a the economy index of C, which means it is somewhat prosperous.
| Metric | Sebastian | Florida Avg | U.S. Average |
|---|---|---|---|
| Median household income | $66,438 | $74,580 | $80,455 |
| Income growth (%/yr) | 4.28% | 5.42% | 4.80% |
| Unemployment rate | 6.5% | 4.8% | 5.2% |
The median household income in Sebastian is about 11% lower than in Florida.
Housing
| Metric | Sebastian | Florida Avg | U.S. Average |
|---|---|---|---|
| Median home price | $316,027 | $311,338 | $248,835 |
| Median rent | $1,564 | $1,668 | $1,407 |
| Homeownership rate | 86.4% | 67.6% | 65.2% |
The median home price in Sebastian is about 16.8 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,564 per month for that long.
Commute Time & Mobility
Commuters in Sebastian spend about 46 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 191 hours, about 7.9 full days, spent commuting.
| Metric | Sebastian | Florida Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 22.9 | 24.0 | 22.4 |
| Round-trip commute (min) | 45.7 | 47.9 | 44.8 |
| Yearly time spent (hours) | 191 | 200 | 187 |
| Estimated yearly cost | $5,907 | $6,189 | $5,790 |
| Work from home | 11.4% | 15.7% | 15.0% |
| Highway traffic (vehicles/day) | — | 14,318 | 8,813 |
| Local road traffic (vehicles/day) | 2,939 | 3,068 | 1,355 |
The average commute time in Sebastian is 23 minutes, shorter than the 24 minutes in Florida.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Sebastian has a education index of D, which means it is barely educated.
| Metric | Sebastian | Florida Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 28.3% | 30.1% | 31.6% |
| Average household size | 2.22 | 2.50 | 2.53 |
Health
Sebastian has a health index of B, which means it is quite healthy.
| Metric | Sebastian | Florida Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.5 | 77.2 | 78.3 |
| Self-rated poor health | 17.2% | 19.5% | 16.3% |
| Smokers | 19.1% | 21.3% | 19.0% |
Frequently Asked Questions
Common questions about Sebastian, Florida.
How many people live in Sebastian, Florida?
About 20,544 people live in Sebastian, Florida, in 9,244 households of 2.2 people on average. The median age is 56.9, so residents are older than the U.S. median of 37.3 by about 20 years.
Is Sebastian, Florida urban or rural?
Averaged over its land area, Sebastian, Florida has 1,128 people per square mile, a density typical of urban and suburban areas. That is about 13 times the U.S. average of 86.
Is Sebastian, Florida an affordable place to live?
The median home costs 4.8 times the median household income ($316,027 against $66,438), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,564 a month takes about 28% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
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