Don Víctor Ramón Castro (February 2, 1820 – May 5, 1900) was a Californio ranchero, politician, and businessman.

Víctor Castro was elected as a juez de campo (field judge) in 1840[1] which gave him authority over roundups and branding of cattle in the area.

He was a renowned horseman and helped battle indigenous raiders who attacked other Mexican ranchos.

[1] He also warred with American immigrants who squatted on his land after the California Gold Rush.

He remained active as a community leader after the annexation of California and was elected a Contra Costa County supervisor in 1852.