Please use this new form to search our natualization database. You must enter some or all of a surname to search, and you can optionally add an approximate year of naturalization and search range (1, 2 or 5 years). The data entered for surname is not case sensitive. For example, "Richard", "RICHARD" and "richard" will return the same result.
This program will automatically search for your surname string anywhere in the original or new surname fields. That is, entering "RICHARD" for the surname will return entries for "Richards", "Richardson" and even "Prichard". With the date entry, just enter the year, for example, 1995.
Copyright © 2001-2017, Contra Costa County Historical Society, all rights reserved.