Proposition 1 or Prop 1 may refer to:
US state propositions
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California Proposition 1 California Proposition 1 may refer to:
* 1998 California Proposition 1, concerning property tax valuation
* 1998 California Proposition 1A, concerning bonds related to education
* 2004 California Proposition 1A, concerning revenue collected by l ...
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Idaho Proposition 1 Idaho Proposition 1 may refer to:
* 1994 Idaho Proposition 1, regarding gay rights
* 2018 Idaho Proposition 1, regarding horse racing
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