# List of snakes of Indiana

All 39 snake taxa that are known to naturally occur in Indiana are tabulated below, along with their population ranges in the state, conservation status, and level of danger they pose to humans (upon biting them).
| 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 |
| 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 ramspotti | Western Fox snake | northwestern corner | uncommon | minimal |
| Pantherophis alleghaniensis | Gray rat snake | throughout | 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 |
| 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 saurita saurita | Eastern ribbon snake | southwest and southcentral | common | minimal |
| Thamnophis saurita septentrionalis | Northern ribbon snake | northern 2/3 | common | minimal |
| Thamnophis sirtalis semifasciatus | Chicago garter snake | Porter county | unknown | minimal |
| Thamnophis sirtalis sirtalis | Eastern garter snake | throughout | abundant | minimal |
| Virginia valeriae elegans | Western earth snake | southwestern 1/3 | uncommon | minimal |