Place:Union, Oregon, United States

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source: Getty Thesaurus of Geographic Names
source: Family History Library Catalog


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Union County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 26,196. Its county seat is La Grande.

Union County comprises the La Grande, OR Micropolitan Statistical Area. It is one of the eight counties of eastern Oregon.

Contents

History

the text in this section is copied from an article in Wikipedia

According to Oregon Geographic Names, the county is named for the town of Union. Union County was originally part of Baker County (which was originally a part of Wasco County, which was originally part of Clackamas County). The northern end of the Grande Ronde Valley was the first part to be settled. During the 1860s, population growth in eastern Oregon prompted the State Legislature to split Umatilla and Baker Counties from Wasco County in 1862. Further settlement in the Grande Ronde Valley led to the division of Baker County to create Union County on October 14, 1864. The county doubled in population between 1880 and 1890.[1]

The choice of a county seat resulted in competition, based on geography and on economic and population growth, between La Grande and the city of Union. The county seat alternated between Union and La Grande until it permanently came to rest at La Grande in 1905. Between 1875 and 1913, adjustments were made between Union County's borders and the borders of Baker, Umatilla, and Wallowa counties.

Timeline

Date Event Source
1864 County formed Source:Red Book: American State, County, and Town Sources
1864 Court records recorded Source:Red Book: American State, County, and Town Sources
1864 Land records recorded Source:Red Book: American State, County, and Town Sources
1864 Marriage records recorded Source:Red Book: American State, County, and Town Sources
1864 Probate records recorded Source:Red Book: American State, County, and Town Sources
1870 First census Source:Population of States and Counties of the United States: 1790-1990
1905 Birth records recorded Source:Red Book: American State, County, and Town Sources
1910 No significant boundary changes after this year Source:Population of States and Counties of the United States: 1790-1990

Population History

source: Source:Population of States and Counties of the United States: 1790-1990
Census Year Population
1870 2,552
1880 6,650
1890 12,044
1900 16,070
1910 16,191
1920 16,636
1930 17,492
1940 17,399
1950 17,962
1960 18,180
1970 19,377
1980 23,921
1990 23,598

Research Tips

External links

www.union-county.org


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