California Proposition 13 may refer to:

• 1978 California Proposition 13, People's Initiative to Limit Property Taxation
• 2010 California Proposition 13, Seismic Retrofitting
• 2020 California Proposition 13, Public Preschool, K-12, and College Health and Safety Bond Act

• California ballot proposition, a referendum or initiative submitted to the California electorate for a vote
• List of California ballot propositions