Naturalization Records dated from July 24, 1914 through June 8, 1917 are retained at the County Clerk Division. Naturalization Index from 1906, 1907-1925, 1918-1919 are also available. These records are Petitions of Intent for Naturalization.
Requests can be made in person at:
San Mateo County Clerk-Recorder
555 County Center 1st Floor
Redwood City CA 94063
Mailed requests must include the name of the person you are requesting (include other possible names and spellings for that person) as well as a date of birth and the approximate date of Naturalization and country of origin.
If you would like to contact our office regarding Naturalization Records, please call 650.363.4500 extension 6063.
Naturalization Index Search & Certificate fee information.