Sebastian, Texas Demographics & Population 2026

Population Overview

Sebastian is a small community located in Texas, within Willacy County. The total population is 1,021. It ranks as the 1009th most populous out of 1,795 Census-designated places in Texas.

Age Demographics

The median age in Sebastian is 42.1 years. This is 18% higher than the state median of 35.6 years. Only 15.0% of residents are under 18, indicating fewer families with children. 15.9% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Sebastian is $22,786. This is 71% lower than the state median of $78,476. It is also 72% lower than the national median of $80,734. The poverty rate stands at 38.0%. This is 176% higher than the state poverty rate of 13.8%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 12.6%. This is 139% higher than the state rate of 5.3%. The median home value is $35,900. Housing costs are 87% lower than the state median of $283,800. With a home-value-to-income ratio of just 1.6x, Sebastian is one of the most affordable housing markets in the area. 60.9% of occupied housing units are owner-occupied. This homeownership rate is 3% lower than the state average of 62.6%.

Race & Ethnicity

Every resident counted in Sebastian was recorded as Hispanic or Latino. A figure of exactly 100.0% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.

Education

1.7% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 95% lower than the state rate of 33.8%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 49.0%.

Data Sources & Methodology

All demographic data for Sebastian, Texas is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Texas state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,795 Census-designated places in Texas. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.