California Proposition 20

California Proposition 20 may refer to:


 * 1914 California Proposition 20 - Prize fights initiative


 * 1922 California Proposition 20 - Approved Osteopathic Initiatives Act
 * 1972 California Proposition 20 - Established the California Coastal Commission
 * 2010 California Proposition 20 - Approved Congressional Redistricting Initiative
 * 2020 California Proposition 20 - Rejected initiative regarding non-violent felonies