Oregon Historical County Records Guide
Polk County Records Inventory
Series documents the granting of United States citizenship to petitioners. Records include applications, witness affidavits, court findings granting or denying citizenship, certificates, and indexes. Declarations of intention may also be included. Information includes name, age, and residence of applicant; applicant's dependents; date of filing of declarations of intention and petitions; and volume and page numbers where papers are recorded.
Records at the Oregon State Archives:
Certificates of Naturalization, vol. 1-8, 1908-1925 (8 volumes);
Naturalization Certification Index [Index to Naturalized Aliens-indexes circuit and county court journals and other records], 1872-1906 (1 volume).
Records at the Polk County Courthouse, Circuit Court Records Office:
[Naturalization Certificate Stubs], ca.1925-ca.1955 (.10 cu.ft.).