Coal Grove is a village in Lawrence County, Ohio, United States, along the Ohio River. The population was 1,889 at the 2020 census. It borders the city of Ironton and lies across the Ohio River from Ashland, Kentucky. It is linked to Ashland by the Ben Williamson Memorial Bridge and Simeon Willis Memorial Bridge.

Lawrence County is the southernmost county of the U.S. state of Ohio. As of the 2020 census, the population was 58,240. Its county seat is Ironton. The county was created in 1815 and later organized in 1817. It is named for James Lawrence, the naval officer famous for the line "do not give up the ship". Lawrence County is part of the Huntington–Ashland metropolitan area.