Harry Britt is a political activist and former supervisor for San Francisco, California. Britt was involved during the late 1960s in the civil rights movement when he was a Methodist minister in Chicago. He was first appointed to the San Francisco Board of Supervisors in January 1979 by Mayor Dianne Feinstein, succeeding Harvey Milk, who was assassinated in City Hall along with Mayor George Moscone by former Supervisor Dan White.
Britt introduced domestic partner legislation in 1982, which was passed by the Board of Supervisors, but vetoed by Mayor Feinstein. In 1989, under Britt's leadership, the board passed domestic partner legislation, which was signed by Mayor Art Agnos. However, voters repealed the domestic partnership law by initiative; a modified version was reinstated by another voter initiative, 1990's Proposition K, also written by Britt. 
Britt chose not to run for reelection in 1992.
Britt ran unsuccessfully for California's 5th congressional district in 1987, narrowly losing to Nancy Pelosi in a special election to fill the seat left when Sala Burton died, with 36 percent of the vote to his 32 percent.  He also was unsuccessful in his race against Mark Leno for the California Assembly in 2002.
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- Gordon, Rachel (2002-03-09). "Britt concedes race to Leno". San Francisco Chronicle. pp. A–18.
- Fulbright, Leslie (2007-07-31). "Progressive New College in academic, fiscal mess". San Francisco Chronicle. pp. A–1.