The Red Onion

The Red Onion is a restaurant located on East Cooper Avenue in Aspen, Colorado, United States. It is the oldest restaurant in the city, housed in a three-story red brick Italianate building dating to the late 19th century. In 1987 it was listed on the National Register of Historic Places as "New Brick–The Brick Saloon", along with other historic properties in the city. It's currently closed with several efforts to reopen it.

It began as a saloon opened by an early city alderman; at one point its upper floors were reportedly home to a brothel. In its early years it was one of three dining establishments in Aspen. It retains much of its original interior, including a bullet hole in the bar. As the city became a popular ski resort, it hosted musical performances by, among others, Billie Holiday and John Denver. It continued operating under various owners for 115 years until closing for structural renovations for three years in the late 2000s.