In 2020, St. Mary's County, MD had a population of 113k people with a median age of 36.5 and a median household income of $95,864. Between 2019 and 2020 the population of St. Mary's County, MD grew from 112,290 to 113,182, a 0.794% increase and its median household income grew from $89,845 to $95,864, a 6.7% increase.
The 5 largest ethnic groups in St. Mary's County, MD are White (Non-Hispanic) (73.6%), Black or African American (Non-Hispanic) (14.3%), Two+ (Non-Hispanic) (3.98%), White (Hispanic) (3.06%), and Asian (Non-Hispanic) (2.57%).
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.
97.5% of the residents in St. Mary's County, MD are U.S. citizens.
In 2020, the median property value in St. Mary's County, MD was $318,500, and the homeownership rate was 70.3%. Most people in St. Mary's County, MD drove alone to work, and the average commute time was 31.7 minutes. The average car ownership in St. Mary's County, MD was 2 cars per household.