Las Gallinas is an unincorporated community in Marin County, California, 6.25 miles (10.06 km) south-southeast of Novato. At an elevation of 26 feet (8 m) Las Gallinas is near the interchange of U.S. Route 101 and Lucas Valley Road/Smith Ranch Road in San Rafael.
Although consisting mainly of residential households, the immediate vicinity also includes a county park with golf course, wild life ponds, a private airport, shops, restaurants and movie theaters. A small industrial park houses low impact companies, storage units, and several non profit organizations.
The area is named for the Rancho San Pedro, Santa Margarita y Las Gallinas Mexican land grant.