Union County is in Eastern Oregon. Of the 36 counties in the Beaver State, Union County ranks 17th in terms of size (2,038 square miles). Oregon's Union County includes almost 2,000 acres of residential land for sale based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here was nearly $22 million. The average price of residential land for sale in Union County was $963,295. Browse all residential land and rural property for sale in Oregon to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.