Richmond is a city in eastern Wayne County, Indiana, United States. Bordering the state of Ohio, it is the county seat of Wayne County. In …Richmond is a city in eastern Wayne County, Indiana, United States. Bordering the state of Ohio, it is the county seat of Wayne County. In the 2020 census, the city had a population of 35,720. It is the principal city of the Richmond micropolitan area. Situated largely within Wayne Township, its area includes a non-contiguous portion in nearby Boston Township, where Richmond Municipal Airport is located.