Museum of Outdoor Arts, Art museum and sculpture garden in Englewood, United States.

The Museum of Outdoor Arts is a non-profit museum and sculpture garden in Englewood, Colorado, founded in 1981 by John W. Madden, Jr. and his daughter Cynthia Madden Leitner. Since its 2022 move to Marjorie Park at Fiddler's Green Amphitheatre it has no indoor galleries; its sculptures, many in public spaces, combine fine art, architecture and landscape design. Its collection includes a limestone Medici lion.

The institution was founded in 1981 by the Madden family and pioneered the integration of site-specific sculptures throughout Colorado's public spaces. This approach changed how art institutions in the region presented their collections to the public.

The museum displays artworks in everyday locations like office parks and public spaces, where visitors encounter installations during ordinary walks around town. This spread makes art part of daily life rather than an isolated experience contained within a building.

Artworks in public areas are freely accessible and can be visited at any time. Access to Marjorie Park, however, requires advance scheduling to join a tour or make an appointment.

The museum owns Fiddler's Green Amphitheatre and has leased it to the Anschutz Entertainment Group since its contract with LiveNation expired in 2013. Its collection also holds a limestone Medici lion sculpture, a detail easy to miss among the outdoor works.