Crestview Hills is a home rule-class city in Kenton County, Kentucky, in the United States. The population was 3,246 at the 2020 census. Crestvi…Crestview Hills is a home rule-class city in Kenton County, Kentucky, in the United States. The population was 3,246 at the 2020 census. Crestview Hills is located in Northern KY. Interstate 275 travels through the city. Interstate 71/75 lies close to the city border. It is the home of Thomas More University.