Colorado, Naturalization Records, 1876-1990

This collection contains naturalization records, declarations of intention, court orders granting petitions, and case files from eight different NARA collections ARC #'s: 649217, 649271, 3514570, 5049445, 5955511, 649183, 1307044, and 720245. Originally captured at the NARA Regional Archives in Denver, Colorado.

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Colorado, Naturalization Records

What is in This Collection?

This collection contains naturalization records, declarations of intention, court orders granting petitions, and case files from eight different NARA collections. See Coverage Table Colorado Naturalization Records, Coverage Table - FamilySearch Historical Records The collections are part of Record Group 21 Records of District Courts of the United States at the NARA Regional Archives in Denver, Colorado. The Colorado Division of Court Services Naturalization Cards are from Record Group 85 Records of the Immigration and Naturalization Service. The Affiliate Publication Number in the results field is the National Archives Identifier or NAID in the online National Archives catalog. See Colorado Naturalization Records

Naturalization is the process of granting citizenship privileges and responsibilities to foreign-born residents. The first naturalization act was passed in 1802. Immigrants to the United States were not required to apply for citizenship. Of those who did apply, many did not complete the requirements for citizenship.

Naturalization to become a U.S. citizen was a two-part process: the Declaration of Intent to Naturalize, or First Papers, and the Naturalization Record (including the Naturalization Petition), or Final Papers. The First Papers were normally filed five years before the Final Papers because of the five-year residency requirement to become a citizen. No centralized files existed before 1906. In 1906 federal forms replaced the various formats that had been used by the various courts. Copies were sent to the Immigration and Naturalization Service (INS), creating a central file for naturalization papers. The INS is now known as the U.S. Citizenship and Immigration Services (USCIS). Additional records and/or images may be added to this collection in the future.


United States District Courts of Colorado

  • Denver Division
  • Del Norte Division
  • Durango Division
  • Grand Junction Division
  • Montrose Division

Related National Archives Collections

To Browse This Collection

You can browse through images in this collection using the waypoints on the Collection Browse Page for Colorado, Naturalization Records, 1876-1990.

Collection Content

Sample Images

Finding Aid

A list of additional naturalization records available from the National Archives can be found at Colorado Naturalization Records.

Inventory

For a list of all the titles included in this Historical Records publication see Colorado Naturalization Records - Inventory

What Can These Records Tell Me?

The following information may be found in these records:

  • Name of court
  • Full name of Petitioner
  • Place of residence
  • Occupation
  • Date and place of birth

  • Date of emigration, date of arrival
  • Port of entry and name of ship
  • Date and place of Declaration of Intent to become citizen
  • Name of spouse
  • Date of marriage

  • Number of children, name and residence of each child
  • Birth date and place of birth of each child
  • Able to speak English?
  • Affidavit of witness(es)

Collection Details

Record Type: Migration
158,496 Records
158,503 Personas
259,357 Images

Location of Original Records

National Archives and Records Administration

Cite This Collection

"Colorado, Naturalization Records, 1876-1990." Database with images. FamilySearch. https://FamilySearch.org : 17 June 2026. Citing various NAID. Records of District Courts of the United States, 1685 - 2009, RG 21 or Records of the Immigration and Naturalization Service, RG 85. National Archives at Denver.