Frankfort is the capital city of the U.S. state of Kentucky. It is a home rule-class city and the seat of Franklin County. As of the 2020 census, the population was 28,602, making it the 13th-largest city in Kentucky and 4th-smallest U.S. state capital by population. Located along the Kentucky River in the Upland South, Frankfort is the principal city of the Frankfort, Kentucky micropolitan area, which includes all of Franklin and Anderson counties.