Alfaroa is a genus of evergreen trees in the Juglandaceae family of the Fagales, growing in montane and submontane tropical rain forests in Central America.

The plants are monoecious, the male flowers being in lateral panicles (several pairs of catkins on an inflorescence) and the female flowers born terminally either in a single spike or in a hermaphroditic panicle including several paired male catkins.

The pollen grains are approximately 24 micrometers in diameter and are slightly triangular in polar view.

Alfaroa includes the following species (This list may be incomplete): A. guatemalensis and A. roxburghiana were originally described as belonging to the genus Engelhardia.

Tropical Tree Seed Manual "Part II—Species Descriptions", USDA Forest Service