Smiths Grove is a home rule-class city in Warren County, Kentucky, United States. The population was 752 as of the 2020 Census. It is included in the Bowling Green, Kentucky Metropolitan Statistical Area.

Warren County is a county located in the south central portion of the U.S. state of Kentucky. As of the 2020 census, the population was 134,554, making it the fifth-most populous county in Kentucky. The county seat is Bowling Green. Warren County is now classified as a wet county after voters approved the measure in 2018. The measure became law in January 2019 that allows alcohol to be sold county wide.