Halcyon, California

Halcyon is an unincorporated community in San Luis Obispo County, California, United States, between Oceano and Arroyo Grande. Founded in 1903 as a Theosophicalintentional community, it is the headquarters of the Temple of the People, a religious organization established in Syracuse, New York, in 1898.

The community developed around cooperative agriculture, a sanatorium, and the Temple's religious activities. Its residents and visitors included the poet John Varian and composer Henry Cowell. The 130-acre (53 ha) Halcyon Historic District, which includes the Blue Star Memorial Temple and other community buildings, was added to the National Register of Historic Places in 2017.