West Milton is a village in Miami County, Ohio, United States. The population was 4,697 at the 2020 census. It is part of the Dayton Metropolitan Statistical Area. The first settlement at West Milton was made in 1807. West Milton was named for John Milton, an English poet. A post office called Milton was established in 1824, and the name was chan…West Milton is a village in Miami County, Ohio, United States. The population was 4,697 at the 2020 census. It is part of the Dayton Metropolitan Statistical Area. The first settlement at West Milton was made in 1807. West Milton was named for John Milton, an English poet. A post office called Milton was established in 1824, and the name was changed to West Milton in 1829. The village was incorporated around 1834.