Latimer is a city in Franklin County, Iowa, United States. The population was 477 at the time of the 2020 census. Latimer got its start in the ye…Latimer is a city in Franklin County, Iowa, United States. The population was 477 at the time of the 2020 census. Latimer got its start in the year 1882, following construction of the Iowa Central railroad through that territory. It was named for its founder, J. F. Latimer.