Nigeria banana frog 
Nilgiri Hills Cricket Frog 
Noellert's Toad 
Norhayati's Flying Frog 
Northeastern Brazilian Leaf Frog 
Northeastern Pepper Frog 
Northern Cordilleras Robber Frog 
Northern cricket frog 
Northern dwarf tree frog 
Northern Glass Frog 
Northern green frog 
Northern leopard frog 
Northern red-legged frog 
Northern Torrent Frog 
Nyctibatrachus beddomii 
Nyctibatrachus grandis 
Nyctibatrachus petraeus 
Nyctibatrachus sanctipalustris 
Nymph Tree Frog 
Oak Toad 
Odorrana indeprensa 
Olive Frog 
Olive Snouted Tree Frog 
Oophaga anchicayensis