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County seat
Name Type County Population (2010) Land area Incorporated
sq mi km2
Alameda City Alameda 73,812 10.61 27.5 April 19, 1854
Albany City Alameda 18,539 1.79 4.6 September 22, 1908
American Canyon City Napa 19,454 4.84 12.5 January 1, 1992
Antioch City Contra Costa 102,372 28.35 73.4 February 6, 1872
Atherton Town San Mateo 6,914 5.02 13.0 September 12, 1923
Belmont City San Mateo 25,835 4.62 12.0 October 29, 1926
Belvedere City Marin 2,068 0.52 1.3 December 24, 1896
Benicia City Solano 26,997 12.93 33.5 March 27, 1850
Berkeley City Alameda 112,580 10.47 27.1 April 4, 1878
Brentwood City Contra Costa 51,481 14.79 38.3 January 21, 1948
Brisbane City San Mateo 4,282 3.10 8.0 November 27, 1961
Burlingame City San Mateo 28,806 4.41 11.4 June 6, 1908
Calistoga City Napa 5,155 2.60 6.7 January 6, 1886
Campbell City Santa Clara 39,349 5.80 15.0 March 28, 1952
Clayton City Contra Costa 10,897 3.84 9.9 March 18, 1964
Cloverdale City Sonoma 8,618 2.65 6.9 February 28, 1872
Colma Town San Mateo 1,792 1.91 4.9 August 5, 1924
Concord City Contra Costa 122,067 30.55 79.1 February 9, 1905
Corte Madera Town Marin 9,253 3.16 8.2 June 10, 1916
Cotati City Sonoma 7,265 1.88 4.9 July 16, 1963
Cupertino City Santa Clara 58,302 11.26 29.2 October 10, 1955
Daly City City San Mateo 101,123 7.66 19.8 March 22, 1911
Danville Town Contra Costa 42,039 18.03 46.7 July 1, 1982
Dixon City Solano 18,351 7.00 18.1 March 30, 1878
Dublin City Alameda 46,036 14.91 38.6 February 1, 1982
East Palo Alto City San Mateo 28,155 2.51 6.5 July 1, 1983
El Cerrito City Contra Costa 23,549 3.69 9.6 August 23, 1917
Emeryville City Alameda 10,080 1.25 3.2 December 8, 1896
Fairfax Town Marin 7,441 2.20 5.7 March 2, 1931
Fairfield City Solano 105,321 37.39 96.8 December 12, 1903
Foster City City San Mateo 30,567 3.76 9.7 April 27, 1971
Fremont City Alameda 214,089 77.46 200.6 January 23, 1956
Gilroy City Santa Clara 48,821 16.15 41.8 March 12, 1870
Half Moon Bay City San Mateo 11,324 6.42 16.6 July 15, 1959
Hayward City Alameda 144,186 45.32 117.4 March 11, 1876
Healdsburg City Sonoma 11,254 4.46 11.6 February 20, 1867
Hercules City Contra Costa 24,060 6.21 16.1 December 15, 1900
Hillsborough Town San Mateo 10,825 6.19 16.0 May 5, 1910
Lafayette City Contra Costa 23,893 15.22 39.4 July 29, 1968
Larkspur City Marin 11,926 3.03 7.8 March 1, 1908
Livermore City Alameda 80,968 25.17 65.2 April 1, 1876
Los Altos City Santa Clara 28,976 6.49 16.8 December 1, 1952
Los Altos Hills Town Santa Clara 7,922 8.80 22.8 January 27, 1956
Los Gatos Town Santa Clara 29,413 11.08 28.7 August 10, 1887
Martinez City Contra Costa 35,824 12.13 31.4 April 1, 1876
Menlo Park City San Mateo 32,026 9.79 25.4 November 23, 1927
Mill Valley City Marin 13,903 4.76 12.3 September 1, 1900
Millbrae City San Mateo 21,532 3.25 8.4 January 14, 1948
Milpitas City Santa Clara 66,790 13.59 35.2 January 26, 1954
Monte Sereno City Santa Clara 3,341 1.62 4.2 May 14, 1957
Moraga Town Contra Costa 16,016 9.43 24.4 November 13, 1974
Morgan Hill City Santa Clara 37,882 12.88 33.4 November 10, 1906
Mountain View City Santa Clara 74,066 12.00 31.1 November 7, 1902
Napa City Napa 76,915 17.84 46.2 March 23, 1872
Newark City Alameda 42,573 13.87 35.9 September 22, 1955
Novato City Marin 51,904 27.44 71.1 January 20, 1960
Oakland City Alameda 390,724 55.79 144.5 May 4, 1852
Oakley City Contra Costa 35,432 15.85 41.1 July 1, 1999
Orinda City Contra Costa 17,643 12.68 32.8 July 1, 1985
Pacifica City San Mateo 37,234 12.66 32.8 November 22, 1957
Palo Alto City Santa Clara 64,403 23.88 61.8 April 23, 1894
Petaluma City Sonoma 57,941 14.38 37.2 April 12, 1858
Piedmont City Alameda 10,667 1.68 4.4 January 31, 1907
Pinole City Contra Costa 18,390 5.32 13.8 June 25, 1903
Pittsburg City Contra Costa 63,264 17.22 44.6 June 25, 1903
Pleasant Hill City Contra Costa 33,152 7.07 18.3 November 14, 1961
Pleasanton City Alameda 70,285 24.11 62.4 June 18, 1894
Portola Valley Town San Mateo 4,353 9.09 23.5 July 14, 1964
Redwood City City San Mateo 76,815 19.42 50.3 May 11, 1867
Richmond City Contra Costa 103,701 30.07 77.9 August 7, 1905
Rio Vista City Solano 7,360 6.69 17.3 January 6, 1894
Rohnert Park City Sonoma 40,971 7.00 18.1 August 28, 1962
Ross Town Marin 2,415 1.56 4.0 August 21, 1908
San Anselmo Town Marin 12,336 2.68 6.9 April 9, 1907
San Bruno City San Mateo 41,114 5.48 14.2 December 23, 1914
San Carlos City San Mateo 28,406 5.54 14.3 July 8, 1925
San Francisco City and county San Francisco 805,235 46.87 121.4 April 16, 1850
San Jose City Santa Clara 945,942 176.53 457.2 March 27, 1850
San Leandro City Alameda 84,950 13.34 34.6 March 21, 1872
San Mateo City San Mateo 97,207 12.13 31.4 September 4, 1894
San Pablo City Contra Costa 29,139 2.63 6.8 April 27, 1948
San Rafael City Marin 57,713 16.47 42.7 February 18, 1874
San Ramon City Contra Costa 72,148 18.06 46.8 July 1, 1983
Santa Clara City Santa Clara 116,468 18.41 47.7 July 5, 1852
Santa Rosa City Sonoma 167,815 41.29 106.9 March 26, 1868
Saratoga City Santa Clara 29,926 12.38 32.1 October 22, 1956
Sausalito City Marin 7,061 1.77 4.6 September 4, 1893
Sebastopol City Sonoma 7,379 1.85 4.8 June 13, 1902
Sonoma City Sonoma 10,648 2.74 7.1 September 3, 1883
South San Francisco City San Mateo 63,632 9.14 23.7 September 19, 1908
St. Helena City Napa 5,814 4.99 12.9 March 24, 1876
Suisun City City Solano 28,111 4.11 10.6 October 9, 1868
Sunnyvale City Santa Clara 140,081 21.99 57.0 December 24, 1912
Tiburon Town Marin 8,962 4.43 11.5 June 23, 1964
Union City City Alameda 69,516 19.47 50.4 January 26, 1959
Vacaville City Solano 92,428 28.37 73.5 August 9, 1892
Vallejo City Solano 115,942 30.67 79.4 March 30, 1868
Walnut Creek City Contra Costa 64,173 19.76 51.2 October 21, 1914
Windsor Town Sonoma 26,801 7.27 18.8 July 1, 1992
Woodside Town San Mateo 5,287 11.73 30.4 November 16, 1956
Yountville Town Napa 2,933 1.53 4.0 February 4, 1965
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