Past Contra Costa County District Attorneys
1850 - 1852: J. F. Williams
1852 - 1853: T. T. Bouldin
1853 - 1857: Hiram Mills
1857 - 1858: E Parker
1858 - 1861: William W Theobald
1861 - 1863: Mark Shepard
1863 - 1875: Hiram Mills
1875 - 1877: Joseph P. Jones
1877 - 1879: F. M. Warmcastle
1879 - 1882: Eli R. Chase
1884 - 1894: W S Tinning
1894 - 1902: C. Y. Brown
1902 - 1910: H. V. Alvardo
1910 - 1915: A. B. McKenzie
1914 - 1918: Thomas D. Johnston
1918 - 1930: A. B. Tinning
1930 - 1934: James F. Hoey
1934 - 1956: Francis P. Healey
1956 - 1960: Francis Collins
1960 - 1965: John A. Nejedly
1968 - 1984: William A. O'Malley1985 - 2001: Gary T. Yancey
2002 - 2010: Robert J. Kochly
2011 - 2017: Mark A. Peterson
2017 - Present: Diana Becton