Acer smileyi is an extinct maple species in the family Sapindaceae described from a series of isolated fossil leaves and samaras.

The oldest group of specimens was recovered from the late Oligocene age Kukak Bay flora exposed on the Katmai National Park and Preserve along the Shelikof Strait in Alaska.

[1] Another paratype leaf was recovered from outcrops of the Langhian age[2] Capps Glacier flora northwest of Kukak Bay in Kenai Peninsula County.

[1] The specimens were studied by paleobotanists Jack A. Wolfe of the United States Geological Survey, Denver office and Toshimasa Tanai of Hokkaido University.

The paired samaras of the species have a 25° to 30° attachment angle and the distal region of the nutlet and wing forming distinct u-shaped shallow sulcus.