Contra Costa County CA Immigration Records

USA (1,373,456) > California (35,455) > Contra Costa County (684) > Contra Costa County Immigration Records (2)

USA (1,373,456) > California (35,455) > California Immigration Records (281) > Contra Costa County Immigration Records (2)

NOTE: Additional records that apply to Contra Costa County are also on the California Immigration Records page.

Contra Costa County Immigration Records

Index to Naturalization In the U.S. District Court for the Northern District of California, 1852 - ca. 1989 Ancestry online

US Naturalization Records, Northern California, 1852-1989 MyHeritage online

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Research Tip

Naturalization documents can list a person's name, age, witnesses, and place of origin. In some cases, women were not required to naturalize separately from their husbands. Before 1906 in the United States, naturalization documents sometimes only listed a home country rather than a specific town or city where a person came from. Since 1906, more detailed information has been included in naturalization documents.

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