The Olompali State Historic Park is a historic site and state park in Novato, California. It features the historic Rancho Olompali, which was acquired by the state government in 1977 and turned into a historic state park.

The Olompali State Historic Park is historically significant for being the site where the oldest house nort of the San Francisco Bay was built. It was a house made of adobe bricks, completed in 1776, by the Chief of the Olompolli tribe, led by Camillo Ynitia. The site is also noted for being the only large land grant awarded by the Mexican government to a Native American tribe.

Today, the site is a popular recreational area, where visitors enjoy hiking, picnicking, and horseback riding. Plans to build structures that will represent a Coast Miwok village are underway.