Geneva is a city in Franklin County, Iowa, United States. The population was 136 at the time of the 2020 census. Geneva was platted in 1871…Geneva is a city in Franklin County, Iowa, United States. The population was 136 at the time of the 2020 census. Geneva was platted in 1871, and it was incorporated as a town in 1903. Geneva is located at 42°40′33″N 93°07′53″W / 42.675905°N 93.131396°W.