Boulder County CO Immigration Records

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USA (1,379,301) > Colorado (13,753) > Colorado Immigration Records (123) > Boulder County Immigration Records (1)

NOTE: Additional records that apply to Boulder County are also on the Colorado Immigration Records page.

Boulder County Immigration Records

Colorado, State and Federal Naturalization Records, 1868-1990 Ancestry 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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