O'Brien County IA Census Records

USA (1,142,393) > Iowa (38,421) > O'Brien County (264) > O'Brien County Census Records (64)

USA (1,142,393) > Iowa (38,421) > Iowa Census Records (6,412) > O'Brien County Census Records (64)


NOTE: Additional records that apply to O'Brien County are also on the Iowa Census Records page.


Countywide Archer Baker Caledonia Carroll in O'Brien County Center in O'Brien County Franklin in O'Brien County Hartley Sanborn Summit

O'Brien County Census Records

1856 Iowa State Census (part of Iowa State Census collection) Ancestry online

1860 Federal U.S. Census MyHeritage online

1860 U.S. Federal Census Ancestry online

1870 Federal U.S. Census MyHeritage online

1870 U.S. Federal Census Ancestry online

1880 Federal U.S. Census MyHeritage online

1880 U.S. Federal Census Ancestry online

1885 Iowa State Census (part of Iowa State Census collection) Ancestry online

1895 Iowa State Census (part of Iowa State Census collection) Ancestry online

1900 Federal U.S. Census MyHeritage online

1900 U.S. Federal Census Ancestry online

1905 Iowa State Census MyHeritage online

1905 Iowa State Census (part of Iowa State Census collection) Ancestry online

1910 Federal U.S. Census MyHeritage online

1910 U.S. Federal Census Ancestry online

1915 Iowa State Census (part of Iowa State Census collection) Ancestry online

1920 Federal U.S. Census MyHeritage online

1920 U.S. Federal Census Ancestry online

1925 Iowa State Census (part of Iowa State Census collection) Ancestry online

1930 Federal U.S. Census MyHeritage online

1930 U.S. Federal Census Ancestry online

1940 Federal U.S. Census MyHeritage online

1940 U.S. Federal Census Ancestry online

Federal Census 1880 US Gen Web Archives online

Federal Census Index Surnames-File 1 of 4 1880 US Gen Web Archives online

Federal Census Index Surnames-File 2 of 4 1880 US Gen Web Archives online

Federal Census Index Surnames-File 3 of 4 1880 US Gen Web Archives online

Federal Census Index Surnames-File 4 of 4 1880 US Gen Web Archives online

Federal Census of 1940, Grant in O'Brien County, Iowa LDS Genealogy online

Federal Census of 1940, Highland in O'Brien County, Iowa LDS Genealogy online

Federal Census of 1940, Liberty in O'Brien County, Iowa LDS Genealogy online

Federal Census of 1940, Lincoln in O'Brien County, Iowa LDS Genealogy online

Federal Census of 1940, Omega, Iowa LDS Genealogy online

Federal Census of 1940, Union in O'Brien County, Iowa LDS Genealogy online

Federal Census of 1940, Waterman, Iowa LDS Genealogy online

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

Iowa, State Census Collection, 1836-1925 Ancestry online

Surname Index 1870 US Gen Web Archives online

U.S. Federal Census 1790-1940 Ancestry online

U.S. Federal Census 1790-1940 MyHeritage online

United States Federal Census, 1790-1940 Family Search online


Archer Census Records

Baker Census Records

Caledonia Census Records

Carroll in O'Brien County Census Records

Center in O'Brien County Census Records

Franklin in O'Brien County Census Records

Hartley Census Records

Sanborn Census Records

Summit Census Records

Additions or corrections to this page? We welcome your suggestions through our Contact Us page