St. Marys, PA
Population 12,612 · Pennsylvania
About St. Marys, PA
St. Marys is a mid-sized city in Pennsylvania with a population of 12,612 residents. The median household income is $64,471 per year, which is near the national average. The median age in St. Marys is 50.3 years.
Housing in St. Marys has a median home value of $143,900 and median monthly rent of $756. Of the 6,156 total housing units, the majority are owner-occupied, with 4,292 owner-occupied and 1,379 renter-occupied units.
The unemployment rate in St. Marys is 8.5% and the poverty rate is 8.4%. 20.5% of residents hold a bachelor's degree or higher. The average commute time is 13.3 minutes.
Cost of Living in St. Marys, PA
Compared to national averages, St. Marys has a median household income of $64,471 (14% below the national median of $75,149). Home values average $143,900, which is 41% below the national median. Monthly rent at $756 is 35% below the US average of $1,163. Within Pennsylvania, St. Marys's income is 12% below the state average of $73,376, and home values are 25% below the state median of $190,903.
Why Live in St. Marys, PA?
St. Marys offers affordable housing with a median home value of $143,900, below the US average of $244,900, and rent that’s lower than the national average at $756/month, and a low poverty rate of 8.4%, better than the national average. Additionally, the city features short commute times averaging just 13.3 minutes.
Potential considerations include median household income ($64,471) that falls below the national average. However, St. Marys’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
St. Marys has a population of 12,612 with a median age of 50.3 years. Compare St. Marys with other cities to see how it stacks up, or explore all cities in Pennsylvania.
Similar Cities Near St. Marys
Cities in Pennsylvania with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Meadville | 12,723 | $46,012 | $115,700 | Compare |
| Bloomsburg | 12,906 | $49,096 | $186,100 | Compare |
| Jefferson Hills | 12,313 | $117,518 | $309,600 | Compare |
| Sharon | 13,019 | $44,595 | $79,100 | Compare |
| Yeadon | 12,091 | $57,336 | $172,500 | Compare |
| New Kensington | 12,072 | $49,644 | $132,400 | Compare |
| Butler | 13,306 | $41,705 | $112,500 | Compare |
| Coatesville | 13,323 | $57,323 | $160,500 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Pennsylvania
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about St. Marys
What is the population of St. Marys, PA?
The population of St. Marys, PA is 12,612 according to the latest Census data.
What is the median household income in St. Marys?
The median household income in St. Marys, PA is $64,471 per year.
What is the median home value in St. Marys?
The median home value in St. Marys, PA is $143,900.
What is the average rent in St. Marys?
The median monthly rent in St. Marys, PA is $756.
What is the unemployment rate in St. Marys?
The unemployment rate in St. Marys, PA is 8.5%.