California's 21st State Assembly district is one of 80 California State Assembly districts. It is currently represented by Democrat Diane Papan of San Mateo.
District profile The district includes most of San Mateo County, California.
Most of San Mateo County – 64.50% Atherton – 2.77% Belmont Brisbane Burlingame East Palo Alto Foster City Hillsborough Menlo Park – 19.41% Millbrae Redwood City San Bruno – 95.76% San Carlos San Mateo South San Francisco – 50.20%
Election results from statewide races Year Office Results2022Governor Newsom 74.8 – 25.2%Senator Padilla 76.2 – 23.8% 2021 Recall 50.1 - 49.9% Elder 58.8 - 6.3% 2020 President Biden 55.3 – 42.3% 2018 Governor Newsom 54.6 – 45.4% Senator De Leon 54.3 – 45.7% 2016 President Clinton 54.6 – 35.9% Senator Harris 51.0 – 49.0% 2014 Governor Brown 53.6 – 46.4% 2012 President Obama 55.6 – 42.0% Senator Feinstein 57.2 – 42.8%
List of assembly members representing the district Due to redistricting, the 21st district has been moved around different parts of the state. The current iteration resulted from the 2021 redistricting by the California Citizens Redistricting Commission.
Assembly members Party Years served Counties represented Notes C. B. CulverRepublican January 5, 1885 – January 3, 1887Yolo Levi B. AdamsDemocratic January 3, 1887 – January 5, 1891 Reese ClarkRepublican January 5, 1891 – January 5, 1893 H. C. Chipman January 5, 1893 – January 7, 1895Sacramento L. T. Hatfield January 7, 1895 – January 4, 1897 Scott F. Ennis January 4, 1897 – January 2, 1899 William D. Knights January 2, 1899 – January 1, 1901 Louis F. ReeberDemocratic January 1, 1901 – January 5, 1903 Stephen H. OlmstedRepublican January 5, 1903 – January 7, 1907Marin Edward I. Butler January 7, 1907 – January 2, 1911 George H. Harlan January 2, 1911 – January 6, 1913Walter A. McDonald January 6, 1913 – January 4, 1915San FranciscoProhibition January 4, 1915 – January 8, 1917 Frederick C. HawesRepublican January 8, 1917 – January 5, 1931 Frank Lee Crist January 5, 1931 – January 2, 1933 Santa Clara Joseph P. Gilmore January 2, 1933 – January 4, 1937San Francisco Joseph Francis SheehanDemocratic January 4, 1937 – January 2, 1939 Joseph P. GilmoreRepublican January 2, 1939 – January 6, 1941 John D. WelchDemocratic January 6, 1941 – January 4, 1943 Albert C. WollenbergRepublican January 4, 1943 – September 19, 1947 Resigned from the California State Assembly. Vacant September 19, 1947 – November 24, 1947 Arthur H. Connolly Jr.Republican November 24, 1947 – January 5, 1953 Won special election to fill the vacant seat left by Wollenberg. He was sworn in on November 24, 1947. Caspar Weinberger January 5, 1953 – January 5, 1959 Milton Marks January 5, 1959 – October 25, 1966 Vacant October 25, 1966 – January 2, 1967 Gordon W. DuffyRepublican January 2, 1967 – November 30, 1974Kings, Tulare Victor CalvoDemocratic December 2, 1974 – November 30, 1980San Mateo, Santa Clara Byron Sher December 1, 1980 – March 28, 1996 Resigned from the California State Assembly to take Oath of office in the California State Senate for the 11th district after winning a special election. Vacant March 28, 1996 – December 2, 1996 Ted LempertDemocratic December 2, 1996 – November 30, 2000 Joe Simitian December 4, 2000 – November 30, 2004 Ira Ruskin December 6, 2004 – November 30, 2010 Rich Gordon December 6, 2010 – November 30, 2012 Adam Gray December 3, 2012 – November 30, 2022 Merced, Stanislaus Diane Papan December 5, 2022 – present San Mateo
Election results (1990–present)
2024
2022
2020
2018
2016
2014
2012
2010
2008
2006
2004
2002
2000
1998
1996
1994
1992
1990
See also California State Assembly California State Assembly districts Districts in California
References
External links District map from the California Citizens Redistricting Commission