
Smithville
- County:
- Clay County
- County Seat:
- No
- Area (mi²):
- 16.155
- State:
- Missouri
Smithville is a city located in Clay County, Missouri. Smithville has a 2025 population of 10,986. Smithville is currently growing at a rate of 0.93% annually and its population has increased by 4.8% since the most recent census, which recorded a population of 10,483 in 2020.
The average household income in Smithville is $108,208 with a poverty rate of 8.84%. The median age in Smithville is 36.8 years: 36.8 years for males, and 36.8 years for females.