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O'Brien County, Iowa
Genealogy, History & Facts

O'Brien County, Iowa Facts

OBrien County

When was O'Brien County, IA Created?
O'Brien County was established on January 15, 1851 from Unorganized Territory.

What is the County Seat of O'Brien County, IA?
The County Seat is located in Primghar and the county government website is

What counties are adjacent to O'Brien County, IA?
Bordering Counties are Osceola County, Clay County, Cherokee County, Sioux County.

O'Brien County, IA Vital Records

Where can find O'Brien County Birth, marriage, Divorce and Death Records?
O'Brien County vital records can be found at the Iowa Office of Vital Records which has copies of birth, marriage and death records from July 1880. There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in Iowa for current fees and application process.

You can search online for O'Brien County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for Iowa Birth Certificate, Marriage Certificate, Death Certificate Application to mail.

O'Brien County, IA Census Records

What O'Brien County, IA census records are available?
There are many types of census records for O'Brien County guide you in researching your family tree. Federal Population Schedules are available for 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

O'Brien Co. Mortality Schedules can be found for 1860, 1870 and 1880. O'Brien Co. Industry and Agriculture can be obtained for 1860, 1870 and 1880. O'Brien Co. Union Veterans Schedules is available for 1890.

Another Iowa census is the Iowa State Census Collection from 1836-1925. One can find free online and printable census forms to help you with your research. See Also Iowa Census Records Research Guide

O'Brien County, IA Courthouse and Government Records

O'Brien County Courthouse

What genealogical records can I find in the O'Brien County Courthouse?
Researchers frequently overlook the great importance of O'Brien County court, probate, and land records data as a useful resource of ancestry and genealogy information. Buried away in Iowa courthouses and archives everywhere are the ambitions and frustrations of countless Iowa residents.

The possibilities are excellent that your forefathers have left a comprehensive document of at least a number of facets of their lives in the O'Brien County court records. Even if your forebears is not referred to in a Court case, contemplate all of the other procedures that could have lead to him or her to appear in court records. See Also Iowa Corthouse Records Research Guide.

O'Brien County, IA Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for O'Brien County, IA?
A list of O'Brien County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide Iowa Archives, Historical & Genealogical Societies.

Where can I connect with other O'Brien County, IA Researchers through message boards and forums?

What other genealogical resources are available in O'Brien County, IA?
The following are web links to Genealogy, Records and Resources pertaining to O'Brien County. Many of these genealogy links fall into 3 categories: Business oriented Sites, Private Sites or Organization Sites. Some have free access some have to have a cost. This is simply a list which has been compiled or submitted. I do not endorse or promote one genealogy site over another.

O'Brien Co. IA Books, Newspapers & Publications

O'Brien Co. IA Cemeteries & Church Records

O'Brien Co. IA Family Websites, Pictures & Histories

O'Brien Co. IA General and History Websites

O'Brien Co. IA Maps, Atlases & Gazetteers

O'Brien Co. IA Military Records

O'Brien Co. IA Schools & Directories

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