Colorado Immigration Records

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Statewide Immigration Records

A-Files (immigrant records,April 1, 1944 to May 1, 1951 U.S. Citizenship and Immigration Services

Alien Registration Forms (Form AR-2), August 1940 to March 1944 U.S. Citizenship and Immigration Services

Colorado Naturalization Records, 1876-1990 Family Search

Colorado, Passenger and Crew Manifests, 1959-1960 Ancestry

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

Declarations of intention, 1877-1952; naturalization dockets, 1906-1916; petitions, 1906-1950; miscellaneous records, 1883-1922 Family History Library

Germans to America Passenger Data File Archives.com

Irish to America Passenger Data File Archives.com

Italians to America Passenger Data File Archives.com

Naturalization Certificate Files (C-Files), September 27, 1906 to March 31, 1956 U.S. Citizenship and Immigration Services

Passenger and Immigration Lists Index, 1500S-1900S Ancestry

Registry Files (immigrant arrival records), March 1929 to March 31, 1944 U.S. Citizenship and Immigration Services

Russians to America Passenger Data File Archives.com

U.S. Naturalization Records - Original Documents, 1795-1972 (World Archives Project) Ancestry

U.S. Naturalization Records Indexes, 1794-1995 Ancestry

U.S. Subject Index to Correspondence and Case Files of the Immigration and Naturalization Service, 1903-1959 Ancestry

U.S. and Canada, Passenger and Immigration Lists Index, 1500s-1900s Ancestry

U.S., Consular Registration Applications, 1916-1925 Ancestry

U.S., Consular Registration Certificates, 1907 - 1918 Ancestry

U.S., German Immigrants, 1712-1933 Ancestry

U.S., Index to Alien Case Files at the National Archives at Kansas City, 1944-2003 Ancestry

U.S., Select Crew Lists and Manifests, 1890-1963 Ancestry

U.S.: Jewish Names in Selected State Department Files, 1910-1929 Ancestry

United States Germans to America Index, 1850-1897 Family Search

United States Index to Alien Case Files, 1940-2003 Family Search

United States Italians to America Index, 1855-1900 Family Search

United States Passport Applications, 1795-1925 Family Search

United States Russians to America Index, 1834-1897 Family Search

Visa Files, July 1, 1924 to March 31, 1944 U.S. Citizenship and Immigration Services

Immigration Records by County

Adams County Immigration Records

Alamosa County Immigration Records

Arapahoe County Immigration Records

Archuleta County Immigration Records

Baca County Immigration Records

Bent County Immigration Records

Boulder County Immigration Records

Broomfield County Immigration Records

Chaffee County Immigration Records

Cheyenne County Immigration Records

Clear Creek County Immigration Records

Conejos County Immigration Records

Costilla County Immigration Records

Crowley County Immigration Records

Custer County Immigration Records

Delta County Immigration Records

Denver County Immigration Records

Dolores County Immigration Records

Douglas County Immigration Records

Eagle County Immigration Records

El Paso County Immigration Records

Elbert County Immigration Records

Fremont County Immigration Records

Garfield County Immigration Records

Gilpin County Immigration Records

Grand County Immigration Records

Gunnison County Immigration Records

Hinsdale County Immigration Records

Huerfano County Immigration Records

Jackson County Immigration Records

Jefferson County Immigration Records

Kiowa County Immigration Records

Kit Carson County Immigration Records

La Plata County Immigration Records

Lake County Immigration Records

Larimer County Immigration Records

Las Animas County Immigration Records

Lincoln County Immigration Records

Logan County Immigration Records

Mesa County Immigration Records

Mineral County Immigration Records

Moffat County Immigration Records

Montezuma County Immigration Records

Montrose County Immigration Records

Morgan County Immigration Records

Otero County Immigration Records

Ouray County Immigration Records

Park County Immigration Records

Phillips County Immigration Records

Pitkin County Immigration Records

Prowers County Immigration Records

Pueblo County Immigration Records

Rio Blanco County Immigration Records

Rio Grande County Immigration Records

Routt County Immigration Records

Saguache County Immigration Records

San Juan County Immigration Records

San Miguel County Immigration Records

Sedgwick County Immigration Records

Summit County Immigration Records

Teller County Immigration Records

Washington County Immigration Records

Weld County Immigration Records

Yuma County Immigration Records