Glen Frazer (formerly, Frazerville) is an unincorporated farming community in Contra Costa County, California, United States. It is located 8 miles (13 km) north of Orinda, at an elevation of 299 feet (91 m). It was the name of the train station used by the Santa Fe Railroad (formerly, Atchison, Topeka and Santa Fe Railroad). It is located along Franklin Canyon Road about 100 yards east of McHarry Ranch Rd. A sign still stands marking the location of the old station. nearest to the town of Martinez, CA. The BNSF Railway still runs along the canyon and past this location. The property was sold to the Santa Fe Railroad by the Frazer Family, but there never was a person named Glen Frazer. It was named Glen because it sat in a glen.
A post office operated at Glen Frazer from 1898 to 1899 (under the name Frazerville) and from 1906 to 1919. Frazer was the name of an early nearby rancher.