The Fairy Doors of Ann Arbor are a series of small doors that are a type of installation art found in the city of Ann Arbor in the U.S. state of Michigan. The first one appeared in the baseboards of the home of Jonathan and Kathleen Wright in 1993. Subsequently, several others were discovered in their home: in the fireplace surround and two in the kitchen. On April 7, 2005, the first was seen in public on the exterior of Sweetwaters Coffee and Tea. Since then, ten more have shown up around Ann Arbor, and seven of the original "public" doors still exist.

Installation art is an artistic genre of three-dimensional works that are often site-specific and designed to transform the perception of a space. Generally, the term is applied to interior spaces, whereas exterior interventions are often called public art, land art or art intervention; however, the boundaries between these terms overlap.