Flatwoods is a city within Greenup County, Kentucky. Flatwoods is considered a suburb of Ashland, Kentucky, in the United States, although Ashland itself is located in neighboring Boyd County. The population was 7,423 at the 2010 census, making Flatwoods the largest city in Greenup County. Flatwoods is a part of the Huntington-Ashland, WV-KY-OH, Metropolitan Statistical Area (MSA). As of the 2000 census, the MSA had a population of 288,649.
Legally, Flatwoods is a 3rd-class city, making it the equivalent of much larger cities such as Florence. Locally, Flatwoods is considered to be a bedroom community, as it has no large employer within the city. Many residents work for CSX Transportation, AK Steel, Marathon Oil, King's Daughters Medical Center, or Our Lady of Bellefonte Hospital. There are five institutions of higher education located within 30–40 minutes of Flatwoods. The Ohio University Southern Campus, Marshall University, Kentucky Christian University, Ashland Community and Technical College and Shawnee State University.