The Bella Union was a saloon and theater that opened on September 10, 1876, in Deadwood, South Dakota.

[1] The proprietor was Tom Miller, an aggressive businessman who would buy several neighboring properties as well.

A fictionalized version of the saloon appeared in the HBO television series Deadwood (2004-2006), where the owner was the character Cy Tolliver.

In Deadwood: The Movie (2019), which is set ten years after the third and final season of the television series, Tolliver has since died, and the saloon is now owned and run by its former madam Joanie Stubbs.

In the musical, Calamity Jane (1953), the character Henry Miller (not Tom), is the proprietor of the town's saloon and theater.