NARA Rocky Mountain Region
Denver Federal Center, Building 48
Denver CO 80225
Colorado Naturalization Records
Colorado, State and Federal Naturalization Records, 1868-1990
Search billions of historical records and family trees on Ancestry, including immigration records, passenger lists, naturalization records, census records, and other documents that can help trace your ancestors' journey.
Start your Ancestry free trialColorado Naturalization Records, 1876-1990
Free trials are a great way to save money on pay-to-view subscriptions. Try these free trials to find your ancestors and start your family tree. Ancestry.com Free Trial, Ancestry.ca Free Trial, Ancestry.UK Free Trial and Ancestry Australia Free Trial
Colorado Naturalization Records by county
Arapahoe Certificate of Citizenship Henry A. Foye from Ireland, Arapahoe County Colorado 1894
Archuleta: Certificates of Naturalization, 6th District Court, Archuleta Co.
Naturalization Index Cards, 6th District Court, Archuleta Co
Declarations of Intentions, 6th District Court, Archuleta Co
Combined Court Case Number Index 1885-1925, Archuleta Co
Bent County naturalization index 1889-1903
Clear Creek County naturalization index 1865-1867 & naturalization index 1878-1906
Denver Index to Naturalization “Declaration of Intentions” File Denver District Federal Court 17 April 1877 to 3 December 1929 [The Foothills Genealogical Society]
Douglas: Index of Declaration of Intention for Citizenship – Douglas County Colorado, 1871 to 1938
Eagle: Declarations of Intention (1883-1916), Eagle County, Colorado
Naturalization Petitions (1907-1928), Eagle County, Colorado
Huerfano: Huerfano County Naturalizations 1882-1929[COGenWeb]
La Plata: Naturalizations in La Plata County District Court in Durango 1882-1921 Online Index [Fort Lewis College]
Larimer: Larimer County Naturalization Index (1885-1958) & naturalization index 1860-1958
Las Animas: Emiliano Frazzini was naturalized at the District Court of the County of Las Animas in Trinidad, Colorado on 17 Oct 1904 by Judge Jesse G. Northcutt. He was naturalized as a minor as he would have been 19 years old in October of 1904. On the back is a affidavit that this is a true and correct copy, the affidavit is dated 30th Sept 1916. The back is also stamped “Passport Application Taken Apr 1 1925, American Consulate General, Rome, Italy”. Witnessed by Donato Danio Carlino and Andrea Putaturo. [silogic.com] & Las Animas County naturalization index 1872-1915
Moffat: Naturalization Records 1912-1941
Park County naturalization index 1903-1906
Weld Weld County Master IndexNaturalization Records from Weld County Court and Weld County District Court retained in the office of Clerk of the District Court, Greeley, CO.
[Alaska] [Alabama] [Arizona] [Arkansas] [California] [Colorado] [Connecticut] [Delaware] [District of Columbia] [Florida] [Georgia] [Hawaii] [Idaho] [Illinois] [Indiana] [Iowa] [Kansas] [Kentucky] [Louisiana] [Maine] [Maryland] [Massachusetts] [Michigan] [Minnesota] [Mississippi] [Missouri] [Montana] [Nebraska] [Nevada] [New Hampshire] [New Jersey] [New Mexico] [New York] [North Carolina] [North Dakota] [Ohio] [Oklahoma] [Oregon] [Pennsylvania] [Rhode Island] [South Carolina] [South Dakota] [Tennessee] [Texas] [Utah] [Vermont] [Virginia] [Washington] [West Virginia] [Wisconsin] [Wyoming]