History of the Office

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'Malley

1985 - 2001: Gary T. Yancey

2002 - 2010: Robert J. Kochly

2011 - 2017: Mark A. Peterson

2017 - Present: Diana Becton