Edward Killingsworth FAIA (1917–2004) was an American architect. He is best known as a participant in Arts & Architecture's Case Study program in the mid-1950s. He designed and built Case Study House #25, "The Frank House," in Naples, California. He also designed numerous luxury hotels all over the world and a large part of the California State University, Long Beach campus. In the architecture world, his name is associated with Southern California Post-and-Beam Mid-Century Modern.