Letts is a city in northern Louisa County, Iowa, United States, established in 1855. The population was 363 at the time of the 2020 census. It is part of the Muscatine Micropolitan Statistical Area. The name is taken from that of local benefactor, Nehemiah Madison Letts (b. 1818 Licking, Ohio – d. 1894 Grandview, Iowa).
thumb|right|Grave of [[Medal of Honor recipient William H. Reddick in Letts]]
Geography
Letts is located one-half mile south of the Louisa-Muscatine county line and two miles west of US Route 61.
According to the United States Census Bureau, the city has a total area of , all land.