St. Marys is a medium-sized city located in the state of Pennsylvania. With a population of 12,361 people and three associated neighborhoods, St. Marys is the 78th largest community in Pennsylvania.

Residents will find that the city is relatively quiet. This is because it is not over-populated, and it has fewer college students, renters, and young children - all of whom can be noisy at times. So, if you're looking for a relatively peaceful place to live, St. Marys is worth considering.

Residents of the city have the good fortune of having one of the shortest daily commutes compared to the rest of the country. On average, they spend only 15.12 minutes getting to work every day.

The population of St. Marys overall has a level of education that is slightly above the US average for all US cities and towns of 21.84%. Of adults 25 and older in St. Marys, 21.38% have at least a bachelor's degree.

The per capita income in St. Marys in 2022 was $37,323, which is middle income relative to Pennsylvania and the nation. This equates to an annual income of $149,292 for a family of four. However, St. Marys contains both very wealthy and poor people as well.

The people who call St. Marys home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of St. Marys residents report their race to be White, followed by Black or African-American. Important ancestries of people in St. Marys include German, Italian, Irish, English, and Polish.

The most common language spoken in St. Marys is English. Other important languages spoken here include Spanish and German/Yiddish.