The Peace and Freedom Party (PFP) is a socialist political party in the United States which operates mostly in California. It was formed in 1966 from anti-Vietnam War and pro-civil rights movements.

PFP operates both as an organization unto itself and an umbrella organization in which socialist organizations compete to win PFP's ballot access.

Notable past and present members include Bob Avakian, Emmy Lou Packard, Byron Randall, and (briefly) Murray Rothbard.

In January 2000, PFP had 75,277 registered voters. In February 2005, PFP had 67,238 registered voters. In January 2010, PFP had 55,036 registered voters. In January 2016, PFP had 75,579 registered voters.

In February 2019, PFP had 76,784 registered voters. In February 2021, PFP had 105,535 registered voters. As of September 2025, PFP had 147,394 registered voters.

Like many minor parties, PFP holds a non-binding "preference primary" for President. The PFP presidential candidate is ultimately selected by the PFP State Convention, at which only State Executive Committee (SEC) members can vote. The SEC is directly elected through write-ins in the California primary system every two years. The SEC had about 130 members in 2024 and 90 in 2008.

Since January 2001, California has had a "modified" closed primary system in which political parties can determine whether or not to allow voters who are not affiliated with any party, or No Party Preference, are allowed to participate in the party's primary. Since the 2004 primaries, PFP has never allowed "independent" voters to vote in their party's primaries.

PFP is a socialist party "committed to feminism, [...] democracy, ecology, and racial equality", PFP strongly supports environmentalism, indigenous rights, LGBT rights, abortion rights, public healthcare, public education, and subsidized housing. PFP is Anti-Zionist.