Ignacio is an unincorporated community in Marin County, California. It is located 3 miles southeast of downtown Novato, at an elevation of 30 feet. Ignacio is a neighborhood located west of Bel Marin Keys, CA. According to the U.S. Geological Survey, it is located at 38°04′13″N 122°32′19″W, placing it north of the interchange of U.S. Route 101 and Ignacio Boulevard, in Novato.