In 2019, St. Marys, PA had a population of 30.3k people with a median age of 47.4 and a median household income of $53,440. Between 2018 and 2019 the population of St. Marys, PA declined from 30,608 to 30,340, a −0.876% decrease and its median household income grew from $51,112 to $53,440, a 4.55% increase.
The 5 largest ethnic groups in St. Marys, PA are White (Non-Hispanic) (97.3%), Black or African American (Non-Hispanic) (0.86%), Asian (Non-Hispanic) (0.504%), White (Hispanic) (0.422%), and Two+ (Non-Hispanic) (0.336%). 0% of the households in St. Marys, PA speak a non-English language at home as their primary language.
99.6% of the residents in St. Marys, PA are U.S. citizens.
In 2019, the median property value in St. Marys, PA was $103,200, and the homeownership rate was 78.6%. Most people in St. Marys, PA drove alone to work, and the average commute time was 18.2 minutes. The average car ownership in St. Marys, PA was 2 cars per household.