Acer republicense is an extinct maple species in the family Sapindaceae described from a single fossil samara.

[1] Acer republicense is known from a single specimen which was recovered from an outcrop of the early Eocene, Ypresian[2] Klondike Mountain Formation in Republic.

[2] The plant community preserved in the Klondike Mountain formation is a mixed conifer–broadleaf forest with large pollen elements of birch and golden larch, but also having notable traces of fir, spruce, cypress, and palm.

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

Wolfe and Tanai published their 1987 type description for A. republicense in the Journal of the Faculty of Science, Hokkaido University.