The Washington Hilton, which was officially known as the Hilton Washington for a period in the early 21st century and is sometimes referred to colloquially as the Hinckley Hilton by locals, is a hotel in Washington, D.C. It is located at 1919 Connecticut Avenue, N.W., roughly at the boundaries of the Kalorama, Dupont Circle, and Adams Morgan neighborhoods. Designed by architect William B.