2016 California Proposition 66

Proposition 66 was a California ballot proposition on the November 8, 2016, ballot to change procedures governing California state court challenges to capital punishment in California, designate superior court for initial petitions, limit successive petitions, require appointed attorneys who take noncapital appeals to accept death penalty appeals, and exempt prison officials from existing regulation process for developing execution methods.

The intention of Proposition 66 was to speed up the process of capital trials and executions. Proposition 66 was approved by voters in the November general election, with 51.1% voting to speed up executions. Proposition 62, which would have abolished the death penalty in California, was rejected by voters in the same election, with 53.1% voting against it. If voters had passed both Proposition 62 and Proposition 66, then the measure with the most "Yes" votes would have taken effect.

The measure was opposed by the editorial boards of the Los Angeles Times, the San Francisco Chronicle, and The Sacramento Bee.