California's 12th congressional district

U. S. House district for California

California's 12th congressional district is a congressional district in northern California. Barbara Lee, a Democrat, has represented the district since January 2023. Currently, the 12th district is located in Alameda County and includes the cities of Oakland, Berkeley, Emeryville, Alameda, Albany, Piedmont, and most of San Leandro. With a Cook Partisan Voter Index rating of D+40, the 12th district is the most Democratic district in both California and the United States, giving nearly 90% of its vote to Democrats in both the 2016 and 2020 presidential elections. Before redistricting in 2023, the 12th district was within San Francisco, encompassing most of the city. The remainder of the city was included in the 14th district.

When the district was created after the 1930 census, it was located in Los Angeles County. As California's population grew, however, the district generally was moved northward, eventually to the San Francisco peninsula. Richard Nixon, who would subsequently serve as the 37th president of the United States, represented this district from 1947 to 1951. Nancy Pelosi, the former speaker of the House, represented the district from 2013 to 2023. She had previously served California's 5th congressional district from 1987 to 1993 and California's 8th congressional district from 1993 to 2013 and currently represents California's 11th congressional district.

Year Office U. S. President U. S. Senator(Class 1) U. S. Senator(Class 3) Governor of California 1992 B. Clinton 58–27% Feinstein 70–26% Boxer 62–31% — 1994 — Feinstein 67–27% — Brown 53–44% 1996 B. Clinton 70–21% — — — 1998 — — Boxer 65–33% Davis 71–26% 2000 Gore 67–27% Feinstein 68–25% — — 2002 — — — Davis 60–27% 2003 — — — Recall: No 66–34% Recall: Bustamante 47–32% 2004 Kerry 72–27% — Boxer 73–24% — 2006 — Feinstein 77–18% — Angelides 51–44% 2008 Obama 74–24% — — — 2010 — — Boxer 68–28% Brown 68–29% 2012 Obama 84–13% Feinstein 89–11% — — 2014 — — — Brown 89–11% 2016 Clinton 86–9% — Harris 78–22% — 2018 — Feinstein 64–36% — Newsom 87–13% 2020 Biden 86–12% — — — 2021 — — — Recall: No 86.9–13.1% 2022 — — Padilla 90.7–9.3% Newsom 90.1–9.9%

Representative Party Dates Congress(es) Electoral history Counties District created March 4, 1933 John H. Hoeppel Democratic March 4, 1933 –January 3, 1937 Elected in 1932. Re elected in 1934. Lost renomination. 1933–1953:Eastern Los Angeles (Pasadena, Pomona, Whittier) Jerry Voorhis Democratic January 3, 1937 –January 3, 1947 Elected in 1936. Re elected in 1938. Re elected in 1940. Re elected in 1942. Re elected in 1944. Lost re election. Richard Nixon Republican January 3, 1947 –November 30, 1950 Elected in 1946. Re elected in 1948. Retired to run for U. S. Senator. Resigned when appointed U. S. Senator. Vacant November 30, 1950 –January 3, 1951 Patrick J. Hillings Republican January 3, 1951 –January 3, 1953 Elected in 1950. Redistricted to the Allan O. Hunter Republican January 3, 1953 –January 3, 1955 Redistricted from the and re elected in 1952. Lost re election. 1953–1963:Fresno, Madera, Merced B. F. Sisk Democratic January 3, 1955 –January 3, 1963 Elected in 1954. Re elected in 1956. Redistricted to the Burt Talcott Republican January 3, 1963 –January 3, 1975 Elected in 1962. Re elected in 1964. Re elected in 1966. Re elected in 1968. Re elected in 1970. Re elected in 1972. Redistricted to the 1963–1967:Monterey, San Benito, San Luis Obispo, Santa Cruz 1967–1973:Kings, Monterey, San Luis Obispo, Santa Cruz 1973–1975:Monterey, San Benito, northwestern San Luis Obispo, southern Santa Clara, Santa Cruz Pete McCloskey Republican January 3, 1975 –January 3, 1983 Redistricted from the and re elected in 1974. Re elected in 1976. Re elected in 1978. Re elected in 1980. Retired to run for U. S. Senator. 1975–1983:Southern San Mateo, northern Santa Clara Ed Zschau Republican January 3, 1983 –January 3, 1987 Elected in 1982. Re elected in 1984. Retired to run for U. S. Senator. 1983–1993:Southern San Mateo, Santa Clara, northern Santa Cruz Ernie Konnyu Republican January 3, 1987 –January 3, 1989 Elected in 1986. Lost renomination. Tom Campbell Republican January 3, 1989 –January 3, 1993 Elected in 1988. Re elected in 1990. Retired to run for U. S. Senator. Tom Lantos Democratic January 3, 1993 –February 11, 2008 Redistricted from the and re elected in 1992. Re elected in 1994. Re elected in 1996. Re elected in 1998. Re elected in 2000. Re elected in 2002. Re elected in 2004. Re elected in 2006. Announced retirement, then died. 1993–2003:Southwestern San Francisco, northern San Mateo 2003–2013:Southwestern San Francisco, northern San Mateo Vacant February 11, 2008 –April 8, 2008 Jackie Speier Democratic April 8, 2008 –January 3, 2013 Elected to finish Lantos's term. Re elected in 2008. Re elected in 2010. Redistricted to the Nancy Pelosi Democratic January 3, 2013 –January 3, 2023 Redistricted from the and re elected in 2012. Re elected in 2014. Re elected in 2016. Re elected in 2018. Re elected in 2020. Redistricted to the 2013–2023:Most of San Francisco Barbara Lee Democratic January 3, 2023 – present Redistricted from the and re elected in 2022. Retiring at end of term to run for U. S. senator. 2023–presentnorthwestern portion of Alameda County