Sinojohnstonia henanensis, a new species from the Muzhaling Scenic Area in Henan Province, China, is described and illustrated. It is morphologically similar to S. chekiangensis and S. ruhuaii but differs from the former in the size of the basal leaves, calyx size, color and size of the corolla, and length of the style; and from the latter in cauline petiole length, calyx size, color and size of the corolla, stamen insertion, filament length, and style length. Additionally, the conservation status and other pertinent notes are provided.