Javelin frog 
Jayaram's Bush Frog 
Jog night frog 
Jordan's Casque-headed Tree Frog 
Kalakad Flying Frog 
Kalophrynus heterochirus 
Kalophrynus palmatissimus 
Kay Rain Frog 
Kelaart's Dwarf Toad 
Kempholey night frog 
Kinabalu Horned Frog 
Kinabalu Slender Toad 
Kinabalu Sticky Frog 
Kirtisinghe's Rock Frog 
Knocking sand frog 
Knuckles Shrub Frog 
Knudsen's Thin-toed Frog 
Koa Tao Island caecilian 
Koadaikanal bush frog 
Kobayashis Horned Frog 
Kokoe Poison Frog 
Kurdistan Spotted Newt 
La Bonita Caecilian 
La Palma glass frog