The Green Gallery is a contemporary art gallery based in Milwaukee, Wisconsin, founded in 2003 by artist John Riepenhoff. The gallery presents a program that combines regional and international perspectives, with a longstanding focus on conceptual practices and a growing emphasis on painting. Its exhibitions often reflect sustained dialogue with artists, highlighting experimental approaches and critical engagement with contemporary culture.

Over the years, The Green Gallery has played a significant role in supporting artists connected to Wisconsin while also working with established figures in the international art world. The gallery is recognized for early support of artists such as Sky Hopinka and for presenting solo exhibitions by well known artists including Gavin Brown and Ugo Rondinone. Collaboration is central to its identity, including an ongoing relationship with artist and curator Michelle Grabner. In addition to operating multiple spaces in Milwaukee, The Green Gallery has participated in more than seventy international art fairs and curatorial projects, with activities extending to institutions such as Tate Modern in London.