Boulder County CO Census Records

1870 Federal U.S. Census MyHeritage

1870 U.S. Federal Census Ancestry

1880 Federal U.S. Census MyHeritage

1880 U.S. Federal Census Ancestry

1885 Colorado State Census MyHeritage

1885 State Census Ancestry

1900 Federal U.S. Census MyHeritage

1900 U.S. Federal Census Ancestry

1910 Federal U.S. Census MyHeritage

1910 U.S. Federal Census Ancestry

1920 Federal U.S. Census MyHeritage

1920 U.S. Federal Census Ancestry

1930 Federal U.S. Census MyHeritage

1930 U.S. Federal Census Ancestry

1940 Federal U.S. Census MyHeritage

1940 U.S. Federal Census Ancestry

1950 United States Federal Census MyHeritage

1950 United States Federal Census Ancestry

Alphabetized listing of census returns and mortality schedules for Boulder County, Colorado, 1860-1885 FamilySearch Library

Census Mortality Index 1870 US Gen Web Archives

Civil War Census Pensioners 1883 Genealogy Trails

Federal Census of 1940, Altona, Colorado LDS Genealogy

Federal Census of 1940, Canfield, Colorado LDS Genealogy

Federal Census of 1940, East Longmont, Colorado LDS Genealogy

Federal Census of 1940, Highland, Colorado LDS Genealogy

Federal Census of 1940, Magnolia, Colorado LDS Genealogy

Federal Census of 1940, Marshall, Colorado LDS Genealogy

Federal Census of 1940, North Boulder, Colorado LDS Genealogy

Federal Census of 1940, North Louisville, Colorado LDS Genealogy

Federal Census of 1940, Pleasant View in Boulder County, Colorado LDS Genealogy

Federal Census of 1940, South Boulder, Colorado LDS Genealogy

Federal Census of 1940, Sugar Loaf, Colorado LDS Genealogy

Federal Census of 1940, West Longmont, Colorado LDS Genealogy

Federal Population Census of the U.S. 1790-1940 Archives.com

Magnolia Census Index 1880 US Gen Web Archives

Mortality Census 1870 Genealogy Trails

Mortality Census 1885 Genealogy Trails

U.S. Federal Census 1790-1950 Ancestry

U.S. Federal Census 1790-1950 MyHeritage

United States Federal Census, 1790-1950 Family Search