O'Brien County, Iowa Genealogy

United States Iowa  O'Brien County

Guide to O'Brien County, Iowa ancestry, family history, and genealogy birth records, marriage records, death records, census records, family history, and military records.

Parent County
1851--O'Brien County was created 15 January 1851 from unorganized territory. It was attached to Woodbury County prior to organization 7 April 1860. County seat: Primghar

Boundary Changes
For animated maps illustrating Iowa County boundary changes, "Rotating Formation Iowa County Boundary Maps" (1816-1872) may be viewed for free at the MapofUS.org website.

Record Loss
For a list of record loss in Iowa Counties see: Iowa Counties with Burned Courthouses

Places/Localities
Town/city records in the FamilySearch Catalog

Neighboring Counties
Buena Vista • Cherokee • Clay • Dickinson • Lyon • Osceola • Plymouth • Sioux

Biography

 * Biographical data and army record of old soldiers who have lived in O'Brien Co., Iowa at Ancestry.com ($)

Lutheran

 * Records of Siloam Lutheran Church, Paullina, in Evangelical Lutheran Church in America database at Archives.com ($).

Local Histories

 * Past and present of O'Brien and Osceola Counties, Iowa at Ancestry.com ($)

Maps

 * Old Antique Atlases & Maps of Iowa

Newspapers
NewspaperArchive.com ($) has a large collection of digitized Iowa newspapers online. This database is sometimes free at libraries.

Societies and Libraries
See also a List of Iowa Archives, Libraries, Publications, Historical & Genealogical Societies