Bellefonte is a home rule-class city in Greenup County, Kentucky, United States. The population was 888 at the 2010 census. Bellefonte is a p…Bellefonte is a home rule-class city in Greenup County, Kentucky, United States. The population was 888 at the 2010 census. Bellefonte is a part of the Huntington-Ashland, WV-KY-OH Metropolitan Statistical Area. In 2013, according to new boundary definitions, the MSA had a population of 361,580.