New Haven
- County:
- Franklin County
- County Seat:
- No
- Area (mi²):
- 3.181
- State:
- Missouri
New Haven is a city located in Franklin County, Missouri. New Haven has a 2026 population of 2,399. New Haven is currently growing at a rate of 0.42% annually but its population has decreased by -0.91% since the most recent census, which recorded a population of 2,421 in 2020.