Lucas Valley is a valley in Marin County, California, drained to the east into San Pablo Bay by Miller Creek,[2] as well as an unincorporated community in the valley, which forms part of the Lucas Valley-Marinwood CDP.

According to the United States Geological Survey, the suburban developments along Miller Creek (including the Lucas Valley-Marinwood CDP) are actually in Gallinas Valley.

[2] Lucas Valley was part of the Rancho San Pedro, Santa Margarita y Las Gallinas grant,[2] a parcel of 21,678.69 acres (8,773.05 ha) awarded to Timothy (Don Timoteo) Murphy on February 14, 1844.

[3] In 1978, film director George Lucas began acquiring land in the area for his Skywalker Ranch.

This Marin County, California–related article is a stub.