Alphonsea maingayi is a species of plant in the Annonaceae family. It native to Peninsular Malaysia and possibly Singapore.
Alphonsea maingayi is a middling to tall tree, whose branches are black. It has elliptic/oblong/lanceolate leaves which are shiny on the upper surface and whose lower surface has a dense covering of rusty, short, soft hairs.
It was first described in 1872 by Joseph Dalton Hooker and Thomas Thomson. The specific epithet, maingayi, honours the botanist, Alexander Carroll Maingay.