Below is a working checklist of Mount Desert Island's reptiles. Please send corrections and updates to info@vfthomas.com. Photographs are welcome. Thank you.
| Order | Family | Genus | Specific Epithet | authority | common name | Sources (full citations given after this table) |
| Testudines | Chelydridae | Chelydra | serpentina | ? | snapping turtle | ANP; Hunter et al. (1999) pp. 121-125; Champlainer (DL) |
| Testudines | Emydidae | Chrysemys | picta | ? | painted turtle | ANP; Hunter et al. (1999) pp. 130-133. |
| Testudines | Emydidae | Emys | blandingii | ? | Blanding's turtle | ANP; Hunter et al. (1999) range map does not show Blanding's Turtle near to MDI. |
| Testudines | Emydidae | Glyptemys | insculpta | ? | wood turtle | ANP; Hunter et al. (1999) pp. 138-143 (as Clemmys insculpta). |
| Testudines | Emydidae | Terrapene | carolina | ? | eastern box turtle | ANP; Hunter et al. (1999) range map does not show the Eastern Box Turtle near to MDI. |
| Serpentes | Colubridae | Diadophis | punctatus | ? | ringneck snake | ANP; Hunter et al. (1999) pp. 165-167. |
| Serpentes | Colubridae | Lampropeltis | triangulum | ? | milk snake | Hunter et al. (1999) pp. 168-170.; Champlainer (DL) |
| Serpentes | Colubridae | Opheodrys | vernalis | ? | smooth green snake | ANP; Hunter et al. (1999) pp. 171-173.; Champlainer (SG) |
| Serpentes | Colubridae | Storeria | occipitomaculata | ? | red-bellied snake | ANP; Hunter et al. (1999) pp. 181-183. |
| Serpentes | Colubridae | Thamnophis | sirtalis | ? | common garter snake | ANP; Hunter et al. (1999) pp. 188-191. |