Aztec Ruins Administration Building-Museum, Pueblo Revival museum in San Juan County, United States.

The Aztec Ruins Administration Building-Museum is a Pueblo Revival-style visitor center at the main entrance to Aztec Ruins National Monument, about 0.75 miles north of U.S. Route 550 by the Animas River. Built in stages from 1919, it has adobe walls, flat roofs and exposed wooden beams, and was listed on the National Register of Historic Places in 1996.

Built in stages from 1919, the building first served as the home of archaeologist Earl Halstead Morris, who lived and worked here as part of a field station of the American Museum of Natural History. It later became the visitor center by the main entrance to Aztec Ruins National Monument. It was listed on the National Register of Historic Places on 11 October 1996 as the Aztec Ruins Administration Building/Museum.

The museum displays objects and exhibits showing how Ancestral Puebloan communities lived, built their structures, and organized their societies. You can see tools, pottery, and other items that reveal their daily practices.

The center is open year-round and offers National Park passport stamps and guided tours to explore the archaeological site. Visitors should allow time to view the indoor exhibits before heading out to see the ruins.

Before becoming a visitor center, the building served as a field station of the American Museum of Natural History, and archaeologist Earl Morris lived and worked in it. It stands about 0.75 miles north of U.S. Route 550, beside the Animas River, and was listed on the National Register of Historic Places in 1996.