Blind Snakes, Family Typhlopidae
- Yucatan Blind Snake, Typhlops
microstomus
Thread Sankes, Family
Leptotyphlopidae
- Goudot's Thread Snake, Leptotyphlops
goudotii
Boas, Family Boidae
- Boa constrictor, Boa constrictor
Colubrids, Family Colubridae
- Southern Racer, Coluber constrictor
- Mottled-jaw Spotbelly Snake, Coniophanes
bipunctatus
- Black-striped Snake, Coniophanes
imperialis
- Striped Spotbelly Snake, Coniophanes
quinquevittatus
- Schmidt's Striped Snake, Coniophanes
schmidti
- Lizard Killer, Conophis lineatus
- Short-faced Snail-eater, Dipsas
brevifacies
- Middle American Smooth-scaled Racer, Dryadophis
melanolomus
- Tropical Indigo Snake, Drymarchon corais
- Speckled Racer, Drymobius margaritiferus
- Red-blotched Ratsnake, Elaphe flavirufa
- ? Blotched Hooknosed Snake, Ficimia
publia
- Common Bluntheaded Treesnake, Imantodes
cenchoa (northeast only)
- Spotted Bluntheaded Treesnake, Imantodes
gemmistratus
- Tropical Milksnake, Lampropeltis
triangulum
- Yucatan Cat-eyed Snake, Leptodeira
frenata
- Small-spotted Cat-eyed Snake, Leptodeira
polysticta
- Green Parrot Snake, Leptophis ahaetulla
- Bronze-backed Parrot Snake, Leptophis
mexicanus
- Neotropical Coachwip, Masticophis
mentovarius
- Red Coffe Snake, Ninia sebae
- Brown Vine Snake, Oxybelis aeneus
- Green Vine Snake, Oxybelis fulgidus
- Long-tailed False Coral, Pliocercus
elapoides
- Bird-eating Treesnake, Pseustes
poecilonotus (northeast only)
- Half Coral Snake, Scaphiodontophis
annulatus (northeast only)
- Common Tropical Ratsnake, Senticolis
triaspis
- Cloudy Snail-eater, Sibon nebulata
(northeast only)
- Yucatan Snail-eater, Sibon sanniola
- Ringed Snail-eater, Sibon sartorii
- Tiger Treesnake, Spilotes pullatus
- Freminville's Scorpion-hunter, Stenorrhino
freminvillii
- Mayan Golden-backed Snake, Symphimus
mayae
- Mayan Black-headed Centipede-eater, Tantilla
cuniculator
- Black-bellied Centipede-eater, Tantilla
moesta
- Yucatan Dwarf Centipede-eater, Tantillita
canula
- Checkered Garter Snake, Thamnophis
marcianus
- Middle American Ribbon Snake, Thamnophis
proximus
Coral Snakes, Family Elapidae
(*venomous)
- Variable Coral Snake, Micrurus diastema
Vipers, Family Viperidae (*venomous)
- Cantil, Agkistrodon bilineatus
- Barba Amarilla, Bothrops asper (northeast only)
- Neotropical Rattlesnake, Crotalus durissus
- Yucatan Hog-nosed Viper, Porthidium yucatanicum