Whitehouse is an unincorporated community in Johnson County, Kentucky, United States. In its early years, it was called Mt. Carbon and housed families from two different coal companies. In 1887, the C&O Railroad reached the community and named the station "Whitehouse" after a large white house that served as a landmark for riverboats. On April 23, 1887, the community named its post office Myrtle, but in 1901, both the post office and community were renamed Whitehouse, after the railroad station. Whitehouse's ZIP code is 41240.