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

The species is known from the early to middle Miocene sediments exposed in Western Oregon, Washington state, USA and Northern Graham Island, Haida Gwaii, Canada.

The last paratype leaf is from the species' northernmost location, having been recovered from an outcrop of the late early Miocene Skonun Formation on the northern side of Graham Island in the Haida Gwaii of British Columbia.

[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.