Union Historic District is a national historic district located at Union, Monroe County, West Virginia. The district includes 174 contributing buildings, 2 contributing sites, 7 contributing structures, and 1 contributing object in the Union and surrounding areas.
Notable properties include the Monroe County Courthouse (c. 1882), Union High School (1939), Monroe County Confederate Monument (1901), Monroe Department Store (1898), Watchman Office (c. 1870), Union Presbyterian Church (1922), Union United Methodist Church (c. 1889), old Baptist Church (c. 1845), All Saints Episcopal Church (c. 1873), old brick Methodist Church (c. 1831), old Union Academy (c. 1820), and Old Temperance Hall (c. 1849). Located in the district are the separately listed Elmwood, Walnut Grove and Brig. Gen. John Echols House.
It was listed on the National Register of Historic Places in 1990.