St. Mary Flag

St. Mary

County Seat:
No
Area (mi²):
0.599
State:
Missouri

St. Mary is a city located in Ste. Genevieve County, Missouri. St. Mary has a 2026 population of 306. St. Mary is currently declining at a rate of -0.65% annually and its population has decreased by -0.33% since the most recent census, which recorded a population of 307 in 2020.

306
Total Population
511
Density (mi²)
-2 -0.65%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)