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.

West Milton uses the council-manager government system. In this system, the mayor is the ceremonial head, elected by the public every four years. The council chooses a City Manager, who holds administrative authority over the city government. Council members are selected on a nonpartisan, at-large ballot. The mayor is Jeremy Sodders.

According to the United States Census Bureau, the village has a total area of 3.34 square miles (8.65 km²), of which 3.24 square miles (8.39 km²) is land and 0.10 square miles (0.26 km²) is water.

As of the 2020 census, West Milton had a population of 4,697. The median age was 40.5 years. 23.2% of residents were under the age of 18 and 20.3% of residents were 65 years of age or older. For every 100 females there were 90.5 males, and for every 100 females age 18 and over there were 86.5 males age 18 and over.

98.4% of residents lived in urban areas, while 1.6% lived in rural areas.

There were 2,026 households in West Milton, of which 28.9% had children under the age of 18 living in them. Of all households, 43.2% were married-couple households, 17.2% were households with a male householder and no spouse or partner present, and 31.0% were households with a female householder and no spouse or partner present. About 33.1% of all households were made up of individuals and 16.6% had someone living alone who was 65 years of age or older.

There were 2,147 housing units, of which 5.6% were vacant. The homeowner vacancy rate was 1.7% and the rental vacancy rate was 5.1%.