Barren 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 44,485. Its county seat is Glasgow. The county was founded on December 20, 1798, from parts of Warren and Green Counties. It was named for the Barrens, meadowlands that cover the northern third, though actually the soil is fertile. Barren County is part of the Glasgow, KY Micropolitan Statistical Area, which is also included in the Bowling Green-Glasgow, KY Combined Statistical Area. In 2007 Barren County was named the "Best Place to Live in Rural America" by Progressive Farmer Magazine.

Glasgow is a home rule-class city in Barren County, Kentucky, United States. It is the seat of its county. Glasgow is the principal city of the Glasgow micropolitan area, which comprises Barren and Metcalfe counties. The population was 15,014 at the 2020 U.S. census.