|Union County Oregon Cities/Towns - Cove, Elgin, Imbler, Island City, La Grande (County Seat), North Powder, Starkey, Summerville, Union
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Union County is a county located in the U.S. state of Oregon. In 2016, its population was 26,087. The seat of the county is La Grande.
The county is named for the town of Union, which is located within its boundaries.