Los Angeles.
Sam Matranga 1905-1917 Killed
Pietro Matranga 1917 Killed
1917-1920 unknown, debatable.
Vito Di Giorgio 1920-1922 Killed in Chicago.
Rosario DeSimone 1922-1925
Al Marco 1925-1928 arrested
1928-1931 Contested
Joe Ardizzone 1931
Jack Dragna 1931-1956
Frank DeSimone 1956-1967
Nick Licata 1967-1974
Dominic Brooklier 1974-1984
Peter Milano 1984-2012

San Francisco.
The San Francisco earthquake in 1906 decimated the leadership in the city. Before that it represented all west coast mafia, then the Colorado families represented all mafia west of them. The Camorra still remained strong, and the Calabrians were becoming stronger.
Early 1910s the closest to a mafia family was the Alioto/Ingrassia/Lazio family connection. 1914 feud with the Pedone/Lafata group, a Camorra gang that lasted till 1924 with the killing of Rosalino Lafata.

Lorenzo Lazio 1917-1919
Nunzio Mannina 1920-1924, sent by New Orleans, then stepped down once the Pedone and Lafata group were no longer a threat. Remained in Bay area until his death in the 1960s.
1924-1928 unknown, possible that Giuseppe Alioto or Luciano Sabella may have taken over. By 1928 Frank Lanza was firmly in control of the Sicilians in the Bay area.
1928-1932 mainly Calabrians versus the Camorra, with Salvatore Lima head of the Calabrians aligning with Frank Lanza and Joe Pizza (Dominic Lonardo) in 1928.
Frank Lanza 1932-1937
Anthony Lima Sr 1937- 1953
Mike Abate 1953-1961
Jimmy Lanza 1961-1986
Anthony Lima Jr 1986-1993.