San Simeon is an unincorporated settlement on the Pacific coast of San Luis Obispo County, California. Its position along State Route 1 is approximately halfway between Los Angeles and San Francisco, each of those towns being roughly 230 mi (370 km) away.
A key feature of the area is Hearst Castle, a hilltop mansion built by William Randolph Hearst in the early 20th century that is now a tourist attraction. Prehistorically the local area was inhabited by the Chumash people, who settled the coastal San Luis Obispo area approximately 10,000 to 11,000 BC, including a large village to the South of San Simeon at Morro Creek.
San Simeon also refers to geologic structures of the local area, particularly elements of the coastal Jurassic Age landforms and opiolite mineral formations of this region.