Forest Knolls is an unincorporated community in Marin County, California.

[1] It is located 9 miles (14 km) southwest of Novato,[2] at an elevation of 249 feet (76 m).

[1] For census purposes, Forest Knolls is aggregated with Lagunitas into the census-designated place Lagunitas-Forest Knolls.

The first post office at Forest Knolls opened in 1916.

[3] There are a number of small historical businesses in Forest Knolls such as the Papermill Creek Saloon.