Union Museum in Union, Oregon in the United States – Finetooth, CC BY-SA 3.0 – Wikimedia Commons Union is located in Union County. About 2,152 people live here (as of 2020). Between 2010 and 2020, the population grew from 2,121 to 2,152. The region is at 851 meters above sea level. The area covers about 6.5 square kilometers. There are about 125 streets in Union. The region was founded in 1878. The postal codes are 97883. The dialing code is 541. Union is city in Oregon, USA. Among other things, Union has restaurants, supermarkets, clothing Stores, banks and pharmacies. More information at www.cityofunion.com.