Washington
- County:
- Franklin County
- County Seat:
- No
- Area (mi²):
- 9.951
- State:
- Missouri
Washington is a city located in Franklin County, Missouri. Washington has a 2026 population of 15,521. Washington is currently growing at a rate of 0.5% annually and its population has increased by 5.59% since the most recent census, which recorded a population of 14,699 in 2020.