Williston, Maryland Demographics & Population 2026

A note before these figures: with a population of 391, Williston's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Williston is a small community located in Maryland, within Caroline County. The total population is 391. It ranks as the 397th most populous out of 527 Census-designated places in Maryland.

Age Demographics

The median age in Williston is 33.2 years. This is 16% lower than the state median of 39.4 years.

Economy, Income & Housing

The median household income in Williston is $129,479. This is 25% higher than the state median of $103,678. It is also 60% higher than the national median of $80,734. The poverty rate stands at 2.6%. This is 73% lower than the state poverty rate of 9.4%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Williston, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $532,700. Housing costs are 27% higher than the state median of $419,900. The home-value-to-income ratio is 4.1x. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 48% higher than the state average of 67.6%.

Race & Ethnicity

Every resident counted in Williston was recorded as White (non-Hispanic). 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

24.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 45% lower than the state rate of 43.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.

Data Sources & Methodology

All demographic data for Williston, Maryland 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 Maryland state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 527 Census-designated places in Maryland. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.