Letts
- County:
- Louisa County
- County Seat:
- No
- Area (mi²):
- 0.567
- State:
- Iowa
Letts is a city located in Louisa County, Iowa. Letts has a 2026 population of 358. Letts is currently growing at a rate of 1.13% annually but its population has decreased by -1.1% since the most recent census, which recorded a population of 362 in 2020.