Prostanthera porcata is a shrub that is endemic to the Budawang Range in south-eastern New South Wales in Australia. It has an upright habit, growing to between 1.5 and 2 metres high. The leaves are 22 to 36 mm long and 7 to 14 mm wide. Flowers appear singly in the leaf axils in spring in the species native range. The floral tube is 15 to 22 mm long and either cream shading to pink on the lobes or wholly pink.