O'Brien County IA Genealogy
USA (1,403,636) > Iowa (44,216) > O'Brien County (306)
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If you're not sure which records would be helpful, you can try our Ancestor Source Finder tool. O'Brien Records by TypeBirth Records (6)Cemetery Records (46) Census Records (66) Church Records (3) City Directories (1) Death Records (10) Histories and Genealogies (16) Immigration Records (3) Land Records (12) Map Records (24) Marriage Records (7) Military Records (8) Miscellaneous Records (2) Newspapers and Obituaries (58) Probate Records (3) School Records (40) Tax Records (1) 
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O'Brien County Records by City/TownArcher Genealogy (39)Baker Genealogy (39) Calumet Genealogy (39) Hartley Genealogy (62) Paullina Genealogy (54) |
Primghar Genealogy (52) Sanborn Genealogy (48) Sheldon Genealogy (74) Sutherland Genealogy (46) |
Overview of O'Brien County Records
- O'Brien County was created in 1851 from unorganized territory.
- Birth, marriage, and death records for 1880 and later can be obtained from the Iowa Department of Public Health.
- The O'Brien County Recorder has birth records starting in 1880, marriage records starting in 1880, death records starting in 1880, land records starting in 1857, and military records starting in 1917.
- The O'Brien County Clerk Courts has divorce records, probate records starting in 1880, and clerk records starting in 1880.
- Online indexes and images for many of the above records can be found by using the links on this site.