Union Building

Union Building(s) may refer to:


 * Union Building (Manhattan), or Decker Building, New York City, US
 * Union Building (University of Texas at Austin), US
 * Union Building, Aldershot, UK
 * Union Building, Hong Kong, demolished in 1950, on the site of the present Chater House
 * Union Building, Shanghai, China
 * Union Building, Toronto, Canada
 * Union Buildings, Pretoria, South Africa
 * Union Buildings, on the campus of the University of Adelaide, Australia