In 2021, St. Mary's County, MD had a population of 113k people with a median age of 36.7 and a median household income of $102,859. Between 2020 and 2021 the population of St. Mary's County, MD grew from 113,182 to 113,209, a 0.0239% increase and its median household income grew from $95,864 to $102,859, a 7.3% increase.
The 5 largest ethnic groups in St. Mary's County, MD are White (Non-Hispanic) (72.7%), Black or African American (Non-Hispanic) (14%), Two+ (Non-Hispanic) (4.97%), Asian (Non-Hispanic) (2.5%), and White (Hispanic) (2.47%).
None of the households in St. Mary's County, MD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
97.4% of the residents in St. Mary's County, MD are U.S. citizens.
In 2021, the median property value in St. Mary's County, MD was $326,800, and the homeownership rate was 71.7%.
Most people in St. Mary's County, MD drove alone to work, and the average commute time was 30.5 minutes. The average car ownership in St. Mary's County, MD was 2 cars per household.