Hylodes regius, also known as the royal tree toad, is a species of frog in the family Hylodidae.

There are two distinct color morphs of adult males: a greenish brown or greenish black dorsal coloration, both with scattered golden yellow blotches and white dots that form oblique lateral stripes; the blotches and dots are also present on the dorsal faces of the fore and hind limbs.

The ventral faces of the arms, tibiae, and thighs, as well as the concealed dorsal surfaces of tarsi and feet, are vivid purple-red.

It occurs in primary forest in and around streams at elevations of 1,850–2,100 m (6,070–6,890 ft) above sea level.

Climate change is projected to degrade the high-elevation forest habitat of this species.