
St Joseph
- County:
- Buchanan County
- County Seat:
- No
- Area (mi²):
- 44.036
- State:
- Missouri
St. Joseph is a city located in Buchanan County, Missouri. St. Joseph has a 2025 population of 69,627. St. Joseph is currently declining at a rate of -0.72% annually and its population has decreased by -3.49% since the most recent census, which recorded a population of 72,144 in 2020.
The average household income in St. Joseph is $76,550 with a poverty rate of 18.66%. The median age in St. Joseph is 37.9 years: 37 years for males, and 39.1 years for females.