The Western Union Company is an American multinational money transfer company, headquartered in Denver, Colorado.

Money can be sent online or in person at Western Union agent locations. Cash can be collected in person at any other Western Union agent location worldwide by providing the 10-digit MTCN (Money Transfer Control Number) and identification. In some cases, a secret question and answer can be used instead of identification.

Founded in 1851 as the New York and Mississippi Valley Printing Telegraph Company in Rochester, New York, the company changed its name to the Western Union Telegraph Company in 1856 after merging with a competitor. The company dominated the American telegraphy industry from the 1860s to the 1980s, pioneering technology such as telex and developing a range of telegraph-related services (including wire money transfer) in addition to its core business of transmitting and delivering telegram messages.

After experiencing financial difficulties, Western Union began to move its business away from communications in the 1980s and increasingly focused on its money transfer services. The company ceased its communications operations completely in 2006 and is now the second-largest money transfer provider in the world.