United States congressional delegations from California

1849–1861: 2 seats

1861–1873: 3 seats

1873–1883: 4 seats

1883–1893: 6 seats

1893–1903: 7 seats

1903–1913: 8 seats

1913–1933: 11 seats

1933–1943: 20 seats

1943–1953: 23 seats

1953–1963: 30 seats

1963–1973: 38 seats

1973–1983: 43 seats

1983–1993: 45 seats

1993–2003: 52 seats

2003–present: 53 seats

After the 2000 U.S. census, California gained one seat. The 2010 U.S. census, however, kept the state's apportionment at 53 seats.

In 2012, owing to a new reapportionment method, some incumbent members chose to run in differently numbered districts (typically within a similar geographic region, with some changing their residence) and owing to a new open primary system, some incumbents were placed against opponents of their own party in the general election. For details concerning these changes and the specific effects upon the 2012 election see Politics of California.

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