Karsten's Girdled Lizard 
Karu's Horned Lizard 
Kashmir rock agama 
Kaya gecko 
Keel-bellied Shade Lizard 
Keel-bellied whipsnake 
Keeled Indian Mabuya 
Keeled Rat Snake 
Keeled slug-eating snake 
Kelung Cat Snake 
Kendall's Rock Gecko 
Kenyan rock agama 
Kenyan sand boa 
Kinabalu Angle-toed Gecko 
King cobra 
King's skink 
Kirindy Leaf-toed Gecko 
Kirk's Rock Agama 
Kleinmann's tortoise 
Knight Anole 
Knobbed Pacific iguana 
Knobloch's Mountain Kingsnake 
Knuckles Bent-toed Gecko 
Knuckles Pygmy Lizard