The slender frog is an Australian and New Guinean frog of the family Microhylidae.
"Slender frog" may also refer to one of several other frogs:
Kajang slender litter frog, a frog in the family Megophryidae endemic to Malaysia Marbled slender frog, a frog in the family Ranidae found in Cambodia, China, Hong Kong, Laos, Malaysia, Myanmar, Thailand, and Vietnam Slender tree frog, a frog in the family Hylidae native to southwestern Australia