
St. Mary's
- County:
- Kusilvak Census Area
- County Seat:
- No
- Area (mi²):
- 44.605
- State:
- Alaska
St. Mary's is a city located in Kusilvak Census Area, Alaska. St. Mary's has a 2025 population of 560. St. Mary's is currently declining at a rate of -1.41% annually and its population has decreased by -6.98% since the most recent census, which recorded a population of 602 in 2020.
The average household income in St. Mary's is $68,163 with a poverty rate of 26.4%. The median age in St. Mary's is 26.2 years: 31.4 years for males, and 24.8 years for females.