Rhododendron kesangiae is a rhododendron species endemic to Bhutan, where it grows at altitudes of 2,890–3,450 m (9,480–11,320 ft) in the fir and hemlock forests.

It is a large shrub[3] or tree that typically grows to 15 m (49 ft) in height, with leaves that are broadly elliptic to almost obovate, and 20–30 cm (7.9–11.8 in) long by 10–16 cm (3.9–6.3 in) broad.

The flowers are rose pink, fading to purple.

The species name kesangiae was given in honour to the Royal Grandmother, Ashi Kesang Choden (born 1930) Wangchuck of Bhutan.

Rhododendron kesangiae flowers from April to May.