Shelby County is a county located in the U.S. state of Kentucky. As of the 2020 census, the population was 48,065. Its county seat is Shelbyville. The county was established in 1792 and named for Isaac Shelby, the first Governor of Kentucky. Shelby County is part of the Louisville/Jefferson County, KY–IN Metropolitan Statistical Area. Shelby County's motto is "Good Land, Good Living, Good People".