Mackaya is a genus of flowering plants in the family Acanthaceae, disjunctly distributed in South Africa and the eastern Himalayas, Southeast Asia, and China. It is sister to Asystasia.
Currently accepted species include:
Some species are cultivated as ornamental plants. Mackaya bella from South Africa, a small evergreen shrub with purple-veined white flowers, has received the Royal Horticultural Society's Award of Garden Merit. It is only hardy down to , so in temperate zones requires protection during the winter months.