The California Pacific International Exposition half dollar, sometimes called the California Pacific half dollar or the San Diego half dollar, is a commemorative fifty-cent piece struck by the United States Bureau of the Mint in 1935 and 1936. Robert I. Aitken designed the coin. Its obverse depicts Minerva and other elements of the Seal of California; the reverse shows buildings from the California Pacific International Exposition (held 1935–1936), which the coin was issued to honor.