Dunn's least gecko (Sphaerodactylus dunni) is a species of lizard in the family Sphaerodactylidae.

[2] The specific name, dunni, is in honor of American herpetologist Emmett Reid Dunn.

[1] The preferred natural habitat of S. dunni is forest, at altitudes of 60–700 m (200–2,300 ft).

[1] The holotype of S. dunni has a snout-to-vent length (SVL) of 25 mm (0.98 in).

The dorsal scales are keeled and imbricate (overlapping).