Dennis Robert Peron (April 8, 1945[1] – January 27, 2018) was an American activist and businessman who became a leader in the movement for the legalization of cannabis throughout the 1990s.

[6][7] He also supported gay activist Harvey Milk, a former Long Island resident,[8] who won an elected seat on the San Francisco Board of Supervisors in 1977.

[4] In 1991, Peron organized for the passage of San Francisco's Proposition P, a resolution calling on the state government to permit medical cannabis, which received 79% of the vote.

[20][3] San Francisco's Board of Supervisors recognized Peron, who was suffering with late-stage lung cancer, with a certificate of honor in 2017.

[16] On January 27, 2018, aged 72,[21] Peron died of lung cancer at the Veteran's Administration Health Center in San Francisco.