Public Media Institute (PMI) is a community-based art and culture organization headquartered in the neighborhood of Bridgeport in the city of Chicago. PMI  showcases emerging and established artists from Chicago and around the world in their network of art spaces and partner organizations. Their main exhibition facility is Co-Prosperity, an experimental cultural center, visual arts and performance space. PMI founded and coordinates Buddy, a retail shop in the Chicago Cultural Center that promotes companies and individuals that manufacture products locally.

PMI also publishes the thematically organized quarterly journal, Lumpen Magazine, featuring local and national artists; two other journals, Proximity, and Mash Tun Journal, as well as other exhibition-specific catalogues and books. In recent years, the organization has expanded to incorporate a community-run FM radio station, Lumpen Radio; instituted an artist-run Programming Council to evaluate and produce proposals for politically urgent and artistically adventurous programs in the gallery.