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