Photo | Scientific Name | Common Name | State Distribution | Conservation Status | Threat to Humans |
 | Agkistrodon contortrix mokasen | Northern Copperhead | southern 1/2 | unknown | moderate |
 | Agkistrodon piscivorus leucostoma | Western Cottonmouth | Dubois and Harrison counties | state endangered | high |
 | Carphophis amoenus helenae | Midwestern Worm Snake | southern 1/2 | unknown | minimal |
| Cemophora coccinea copei | Northern Scarlet Snake | Floyd county | state endangered | minimal |
 | Clonophis kirtlandii | Kirtland's Snake | everywhere but southwest | state endangered | minimal |
 | Coluber constrictor foxii | Blue Racer | northern 2/3 | common | minimal |
 | Coluber constrictor priapus | Southern Black Racer | southern 1/3 | common | minimal |
 | Crotalus horridus | Timber Rattlesnake | southern 1/3 | state endangered | very high |
 | Diadophis punctatus edwardsii | Northern Ringneck Snake | everywhere but central 2/3 | uncommon | minimal |
 | Farancia abacura reinwardtii | Western Mud Snake | southwestern tip | state endangered (extirpated) | minimal |
 | Heterodon platirhinos | Eastern Hognose Snake | throughout | uncommon | minimal |
 | Lampropeltis calligaster calligaster | Prairie Kingsnake | southwest, southcentral, and along western border | uncommon | minimal |
 | Lampropeltis nigra | Black Kingsnake | southwestern 1/3 | common | minimal |
 | Lampropeltis triangulum syspila | Red Milk Snake | southwest | common | minimal |
 | Lampropeltis triangulum triangulum | Eastern Milk Snake | everywhere but southwest | common | minimal |
 | Nerodia erythrogaster neglecta | Copperbelly Water Snake | southern 1/3 and northeast corner | state endangered, federally threatened | minimal |
 | Nerodia rhombifer rhombifer | Northern Diamondback Water Snake | southwestern corner | abundant | minimal |
pic unavailable | Nerodia sipedon pleuralis | Midland Water Snake | southern 1/2 | common | minimal |
 | Nerodia sipedon sipedon | Northern Water Snake | throughout | common | minimal |
 | Opheodrys aestivus aestivus | Northern Rough Green Snake | southern 1/3 | special concern | minimal |
 | Opheodrys vernalis blanchardi | Western Smooth Green Snake | northwest | state endangered | minimal |
 | Pantherophis obsoletus | Black Rat Snake | throughout | common | minimal |
 | Pantherophis ramspotti | Western Fox Snake | northwestern corner | uncommon | minimal |
 | Pantherophis spiloides | Gray Rat Snake | southwestern corner | common | minimal |
 | Pituophis catenifer sayi | Bullsnake | northwest | uncommon | minimal |
 | Regina septemvittata | Queen Snake | everywhere but southwestern corner | uncommon | minimal |
 | Sistrurus catenatus catenatus | Eastern Massasauga Rattlesnake | northern 1/3 | state endangered, federal candidate | high |
 | Storeria dekayi dekayi | Northern Brown Snake | northeast corner | abundant | minimal |
pic unavailable | Storeria dekayi wrightorum | Midland Brown Snake | throughout | abundant | minimal |
 | Storeria occipitomaculata occipitomaculata | Northern Redbelly Snake | everywhere but central 2/3 | uncommon | minimal |
 | Tantilla coronata | Southeastern Crowned Snake | Floyd and Clark counties | state endangered | minimal |
 | Thamnophis butleri | Butler's Garter Snake | northeast | state endangered | minimal |
 | Thamnophis proximus proximus | Western Ribbon Snake | everywhere but southeast and eastcentral | special concern | minimal |
 | Thamnophis radix | Plains Garter Snake | northwest | uncommon | minimal |
 | Thamnophis sauritus sauritus | Eastern Ribbon Snake | southwest and southcentral | common | minimal |
pic unavailable | Thamnophis sauritus septentrionalis | Northern Ribbon Snake | northern 2/3 | common | minimal |
pic unavailable | Thamnophis sirtalis semifasciatus | Chicago Garter Snake | Porter county | unknown | minimal |
 | Thamnophis sirtalis sirtalis | Eastern Garter Snake | throughout | abundant | minimal |
pic unavailable | Virginia valeriae elegans | Western Earth Snake | southwestern 1/3 | uncommon | minimal |