San Sebastián Municipio, Puerto Rico Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 23rd-largest in Puerto Rico
The population of San Sebastián Municipio, Puerto Rico is 39,168 as of the 2023 American Community Survey, making it the 23rd-largest county in Puerto Rico. The median household income is $17,834, the median home value is $110,500, and the median age is 46.5.
39,168
Population
556
People / sq mi
$17,834
Median Income
$110,500
Median Home Value
San Sebastián Municipio covers 70 sq mi of land at 556.2 people per square mile.
About San Sebastián Municipio,
Among US counties, San Sebastián Municipio stands out first on household income: a median of $17,834, below the US median of $78,538. San Sebastián Municipio is a county in Puerto Rico with a population of 39,168. It ranks #23 among counties in Puerto Rico by population.
Incomes are among the lowest of comparable places, with a median household income of $17,834, below the US median of $78,538. The poverty rate, 48.0%, is among the steepest of comparable US counties and above the national 12.4%. Housing is relatively affordable, with a median home value of $110,500, with typical rent around $481.
Remote work is rare here (3.2%, below the national 14.0%), and the average commute runs about 26 minutes each way.
Race & Ethnicity
| White | 71.8% |
| Black or African American | 2.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.1% |
| Two or More Races | 0.0% |
Age & Sex
46.5
Median Age
51.4%
Female
48.6%
Male
25.4%
Age 65+
Age Distribution
Children (under 15): 13.2% · Seniors (65+): 25.4%
Income & Poverty
| Median household income | $17,834 |
| Mean household income | $27,976 |
| Per-capita income | $11,827 |
| Poverty rate | 48.0% |
| Unemployment rate | 5.4% |
| Employment-to-population | 33.8% |
Top Industries by Employment
The largest employment sector in San Sebastián Municipio is professional & business services, accounting for 25.5% of workers.
How residents commute
0.0%
Drive alone
5.0%
Carpool
81.7%
Public transit
3.2%
Work from home
26.2 min
Avg commute
Housing
$110,500
Median home value
$481
Median rent
71.2%
Homeownership rate
18,533
Total housing units
76.8%
Occupied
23.2%
Vacant
28.8%
Renter-occupied
Social & access
94.7%
With health insurance
Education
-
High School+
-
Bachelor's+
Largest cities in Puerto Rico
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Part of Puerto Rico
County rankings
Frequently Asked Questions
San Sebastián Municipio, Puerto Rico has a population of 39,168 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 23rd-largest county in Puerto Rico. Population density is 556 people per square mile.
The median household income in San Sebastián Municipio, Puerto Rico is $17,834, with mean (average) household income of $27,976 and per-capita income of $11,827. 48.0% of residents live below the federal poverty level.
In San Sebastián Municipio, the largest racial and ethnic groups are White (71.8%), Hispanic or Latino (3.1%), Black or African American (2.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in San Sebastián Municipio, Puerto Rico is 46.5 years. Residents are 51.4% female and 48.6% male.
The median home value in San Sebastián Municipio is $110,500 and median monthly rent is $481. 71.2% of occupied housing units are owner-occupied. The county has 18,533 total housing units, 23.2% of which are vacant.
The largest employment sector in San Sebastián Municipio, Puerto Rico is professional, scientific, and management services, employing 25.5% of workers. The unemployment rate is 5.4%.
San Juan is among the largest cities associated with San Sebastián Municipio, Puerto Rico, with a population of 320,691.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.