There are eleven locations and sites which the Dia Art Foundation considers part of its constellation of art museums and long-term installations. Dia breaks its holdings into two distinct categories: locations and sites. "Locations" include museum structures that contain galleries of smaller works either on permanent or temporary display, while "sites" are long-term art installations placed outside of the gallery context that have been either commissioned or acquired by Dia. All three locations are found in New York state, while the eight sites are located in New York, Utah, New Mexico, and Germany. Currently one location, , is scheduled to be opened in 2022, and there are seven sites that were once listed by Dia but are no longer listed.