Archival Research Catalog (ARC)

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About Naturalization Records

Naturalization records contain files that include two main types of documents:

  1. declarations of intention to become naturalized as a U.S. citizen, which applicants filed in federal court
  2. petitions for naturalization to the United States requesting citizenship, which applicants filed in federal court

Additional information such as applicant's age, occupation, and arrival information is often found in naturalization records. In some cases an oath of allegiance to uphold the Constitution of the United States and a certificate of citizenship are included.

Declarations of Intention and Petitions for Naturalization at Rocky Mountain Region

The Archival Research Catalog (ARC) contains thousands of descriptions of declarations of intention and petitions for naturalization held by the Rocky Mountain Region. The descriptions include individuals' names. Currently, ARC has descriptions covering New Mexico.

For additional information, please see:

Browse all "Naturalization Declarations and Petitions, 1912-1963" filed in New Mexico:
  1. Click on this link for Naturalization Declarations and Petitions, 1912-1963 (ARC Idenifier 1055070) ARC Search Link Logo
  2. ARC will open a search window with the full details.
  3. Under the Includes field, click on the link for 3,815 items available in ARC.

    Description for ARC ID 1055070, which includes 3,815 items

  4. All of the declarations and petitions will appear in alphabetical order by last name of the applicant. Browse through the brief results, and click on the Title link if you wish to see the full result of a description.



Search by name of applicant:
  1. Go to http://www.archives.gov/research/arc/.
  2. Press the yellow Search button to go to the Basic search screen.
  3. Enter keywords [type of naturalization document] and [last name] in the Keywords box.
    • Types of naturalization documents in the series:
      • {declaration of intention}
      • {armed forces petition and certificate of naturalization}
      • {petition for naturalization}
    • Examples:
      • If you also know the individual's the first name, try adding the full name in first name-last name order. For example: {declaration of intention} and Michele Luchetti
      • If you do not find the individual you seek in your first search, try again using a variant spelling of the last name. For example: {petition for naturalization} and (Luchetti or Lucetti)

        Example of an ARC keyword search for a declaration of intention by an individual's name.

  1. Select the limit results radio button for 2000.
  2. Select the Location filter for NARA's Rocky Mountain Region (Denver) .
  3. Press the Go button.
  4. When hits are returned for your search, view the full result of your hit by selecting the Title link.

    Declaration of Intention, Number 27081, for Enrico Fermi, 12/02/1939



    Please Note: This sample digitized declaration of intention is from NARA's Great Lakes Region in Chicago. Digital copies of declarations from the Rocky Mountain Region are not available in ARC at this time. You can request reproductions of naturalization records online.

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