Elections were held in California on November 6, 2012. On the ballot were eleven propositions, various parties' nominees for the United States presidency, the Class I Senator to the United States Senate, all of California's seats to the House of Representatives, all of the seats of the State Assembly, and all odd-numbered seats of the State Senate.

This was the first general election with California's newly implemented nonpartisan blanket primary in effect, pursuant to Proposition 14, which passed with 53% voter approval in June 2010. Additionally, in November 2010, voters approved Proposition 20, which authorized a California Citizens Redistricting Commission to re-draw congressional district lines, in addition to its current job of drawing state senate district lines and state assembly district lines, taking away that job from the California state legislature. This was the first general election whose winners represent districts drawn by the Citizens Redistricting Commission.

After the election, California's congressional delegation gained four new Democrats, including the first gay Asian American elected to Congress. Dianne Feinstein won her re-election bid for the U.S. Senate, and the Democrats gained a 2/3 supermajority in both of the state's legislative chambers. California voters also voted to re-elect incumbent president Barack Obama, giving him the state's fifty-five electoral votes. Among the propositions on the ballot, voters chose to increases taxes in order to fund education and other state programs, voted to keep the death penalty and the power of labor unions to use payroll deduction to fund political campaigns, and opted to reform the state's three-strikes law.

11 propositions have been qualified for the ballot.

This is an initiative constitutional amendment that would increase income tax on incomes over $250,000 for seven years and raise the statewide sales tax by 0.25% for four years, and allocates the additional incomes to education, as well as certain state services transferred from the state to local governments. If this measure and Proposition 38 both pass, then the measure with more "Yes" votes will take effect.

This is an initiative constitutional amendment that would make several changes to the state budget process. It would change California's budget from an annual budget to a biennial budget, require the legislature to show how bills that increase state spending over $25 million would be offset, give the governor power to reduce spending if there is no budget for more than 45 days, require performance reviews of state and local programs, and allow local governments more power over how they administer programs funded by state taxes. It also requires bills to be published at least three days before they are voted on.

Proposition 32 is an initiative statute. It would prohibit unions from using payroll-deducted funds for political purposes (the same restriction applying to payroll deductions, if any, by corporations and government contractors). In addition, it would permit voluntary employee contributions to an employee-sponsored committee or union with yearly written authorization, ban contributions to candidates and candidate-controlled committees by corporations and labor unions, and ban contractors who receive government contracts (including public-sector labor unions with collective bargaining agreements) from donating to office holders involved in awarding the contract or committees controlled by said officers.

Similar to the failed Proposition 17 on the June, 2010 ballot. This is an initiative statute that would allow auto insurance companies to charge based on continuity (length) of the buyer's insurance coverage.