Union County, Oregon Genealogy

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United States Gotoarrow-kelly.png Oregon Gotoarrow-kelly.png Union County

County Courthouse

Union County Courthouse
1106 K Avenue
LaGrande, OR 97850
Phone: 541.963.1006 

County Clerk has marriage and land records from 1875
and naturalization records 1900-1975;
Clerk Circuit Court has divorce, probate and court records from 1854

 Union was the former county seat until 1901.

Quick Facts

Wikipedia has more about this subject: Union County, Oregon

14 October 1864: Union county was created from Baker County. [1]

Named for the city of Union which is located within the boundaries, a county seat at the time of the creation of the county.

  • Records Held at the Courthouse

County Records Inventory listing the records held at the Union County Court House as of October 2005.

  • Record Loss:

Boundary Changes

11 February 1887: Wallowa County was set off.

1 February 1901: Southeast portion of Union known as the Panhandle was annexed to Baker County by the order of the State Legislature.

Places / Localities

Trivia Tidbits

Information about localities, too small or too brief to describe in separate pages. Exception to this are Post Offices. > Trivia Tidbits




LDS Cemetery Records

Vol. 21 page 177 - Lower Cove Cemetery, Alical


  • 1870
  • 1880
  • 1890
  • 1900
  • 1910
  • 1920
  • 1930

Church History and Records

Court Records


Land and Property



Early migration routes to and from Union County, Oregon Genealogy for European and African American settlers included:

  • Oregon Trail 1830s to 1890s from western Missouri to Oregon City, Oregon[2]



Probate Records

Rivers and Waterways

Details about the rivers and waterways where farms and settlements are often found along them. >> Rivers and Waterways


Vital Records

Many early marriages are listed on the Western States Marriage Index.

Societies, Libraries and Museums

Family History Centers



  1. WorldCat 50140092FHL Collection Handybook for Genealogists: United States of America, 10th ed.] (Draper, Utah: Everton Pub., 2002)
  2. Jim Tompkins, "The Oregon Trail 1841-1848 Map VI" in Oregon Trail Landmarks at http://www.oregonpioneers.com/OTMap6.jpg (accessed 18 July 2011).