Kilgore is a city in Gregg and Rusk counties in the eastern part of the U.S. state of Texas. Over three-fourths of the city limits is located in Gregg County, the remainder in Rusk County. Kilgore was the childhood residence from age six of the noted classical pianist Van Cliburn, the namesake for Van Cliburn Auditorium on the Kilgore College campus. The population was 12,975 at the 2010 census; a July 2015 estimate placed it at 14,947.