- Actinemys - Western Pond Turtles
- Actinemys marmorata - Western Pond Turtle
- Apalone - North American Softshells
- Apalone ater - Black Spiny Softshell
- Apalone ferox - Florida Softshell
- Apalone mutica - Smooth Softshell
- A. m. calvata - Gulf Coast Smooth Softshell
- A. m. mutica - Midland Smooth Softshell
- Apalone spinifera - Spiny Softshell
- A. s. aspera - Gulf Coast Spiny Softshell
- A. s. emoryi - Texas Spiny Softshell
- A. s. guadalupensis - Guadalupe Spiny Softshell
- A. s. hartwegi - Western Spiny Softshell
- A. s. pallida - Pallid Spiny Softshell
- A. s. spinifera - Eastern Spiny Softshell
- Caretta - Loggerhead Sea Turtles
- Caretta caretta - Loggerhead Sea Turtle
- Chelonia - Green Sea Turtles
- Chelonia mydas - Green Sea Turtle
- Chelydra - Snapping Turtles
- Chelydra rossignonii - Central American Snapping Turtle
- Chelydra serpentina - Snapping Turtle
- C. s. osceola - Florida Snapping Turtle
- C. s. serpentina - Eastern Snapping Turtle
- Chrysemys - Painted Turtles
- Chrysemys dorsalis - Southern Painted Turtle
- Chrysemys picta - Painted Turtle
- C. p. bellii - Western Painted Turtle
- C. p. marginata - Midland Painted Turtle
- C. p. picta - Eastern Painted Turtle
- Claudius - Narrow-bridged Musk Turtles
- Claudius angustatus - Narrow-bridged Musk Turtle
- Clemmys - Spotted Turtles
- Clemmys guttata - Spotted Turtle
- Deirochelys - Chicken Turtles
- Deirochelys reticularia - Chicken Turtle
- D. r. chrysea - Florida Chicken Turtle
- D. r. miaria - Western Chicken Turtle
- D. r. reticularia - Eastern Chicken Turtle
- Deirochelys reticularia - Chicken Turtle
- Dermatemys - Central American River Turtles
- Dermatemys mawii - Central American River Turtle
- Dermochelys - Leatherback Sea Turtles
- Dermochelys coriacea - Leatherback Sea Turtle
- Emydoidea - Blanding's Turtles
- Emydoidea blandingii - Blanding's Turtle
- Eretmochelys - Hawksbill Sea Turtles
- Eretmochelys imbricata - Hawksbill Sea Turtle
- E. i. bissa - Pacific Hawksbill Sea Turtle
- E. i. imbricata - Atlantic Hawksbill Sea Turtle
- Eretmochelys imbricata - Hawksbill Sea Turtle
- Geochelone - Typical Tortoises
- Geochelone carbonaria - Red-footed Tortoise
- Geochelone sulcata - African Spurred Tortoise
- Glyptemys - Sculpted Turtles
- Glyptemys insculpta - Wood Turtle
- Glyptemys muhlenbergii - Bog Turtle
- Gopherus - Gopher Tortoises
- Gopherus agassizii - Desert Tortoise
- Gopherus berlandieri - Texas Tortoise
- Gopherus flavomarginatus - Bolson Tortoise
- Gopherus polyphemus - Gopher Tortoise
- Graptemys - Map Turtles
- Graptemys barbouri - Barbour's Map Turtle
- Graptemys caglei - Cagle's Map Turtle
- Graptemys ernsti - Escambia Map Turtle
- Graptemys flavimaculata - Yellow-blotched Map Turtle
- Graptemys geographica - Northern Map Turtle
- Graptemys gibbonsi - Pascagoula Map Turtle
- Graptemys nigrinoda - Black-knobbed Map Turtle
- G. n. delticola - Southern Black-knobbed Map Turtle
- G. n. nigrinoda - Black-knobbed Map Turtle
- Graptemys oculifera - Ringed Map Turtle
- Graptemys ouachitensis - Ouachita Map Turtle
- G. o. ouachitensis - Ouachita Map Turtle
- G. o. sabinensis - Sabine Map Turtle
- Graptemys pseudogeographica - False Map Turtle
- G. p. kohnii - Mississippi Map Turtle
- G. p. pseudogeographica - False Map Turtle
- Graptemys pulchra - Alabama Map Turtle
- Graptemys versa - Texas Map Turtle
- Kinosternon - American Mud Turtles
- Kinosternon acutum - Tabasco Mud Turtle
- Kinosternon alamosae - Alamos Mud Turtle
- Kinosternon arizonense - Arizona Mud Turtle
- Kinosternon baurii - Striped Mud Turtle
- Kinosternon chimalhuaca - Jalisco Mud Turtle
- Kinosternon creaseri - Creaser's Mud Turtle
- Kinosternon durangoense - Durango Mud Turtle
- Kinosternon flavescens - Yellow Mud Turtle
- Kinosternon herrerai - Herrera's Mud Turtle
- Kinosternon hirtipes - Rough-footed Mud Turtle
- K. h. chapalense - Lake Chapala Mud Turtle
- K. h. hirtipes - Valley Of Mexico Mud Turtle
- K. h. magdalense - San Juanico Mud Turtle
- K. h. megacephalum - Viesca Mud Turtle
- K. h. murrayi - Big Bend Mud Turtle
- K. h. tarascense - Pátzcuaro Mud Turtle
- Kinosternon integrum - Mexican Mud Turtle
- Kinosternon leucostomum - White-lipped Mud Turtle
- K. l. leucostomum - Northern White-lipped Mud Turtle
- Kinosternon oaxacae - Oaxaca Mud Turtle
- Kinosternon scorpioides - Scorpion Mud Turtle
- K. s. abaxillare - Central Chiapas Mud Turtle
- K. s. cruentatum - Red-cheeked Mud Turtle
- Kinosternon sonoriense - Sonoran Mud Turtle
- K. s. longifemorale - Sonoyta Mud Turtle
- K. s. sonoriense - Sonoran Mud Turtle
- Kinosternon subrubrum - Eastern Mud Turtle
- K. s. hippocrepis - Mississippi Mud Turtle
- K. s. steindachneri - Florida Mud Turtle
- K. s. subrubrum - Eastern Mud Turtle
- Lepidochelys - Ridley Sea Turtles
- Lepidochelys kempii - Kemp's Ridley Sea Turtle
- Lepidochelys olivacea - Olive Ridley Sea Turtle
- Macrochelys - Alligator Snapping Turtles
- Macrochelys temminckii - Alligator Snapping Turtle
- Malaclemys - Diamond-backed Terrapins
- Malaclemys terrapin - Diamond-backed Terrapin
- M. t. centrata - Carolina Diamond-backed Terrapin
- M. t. littoralis - Texas Diamond-backed Terrapin
- M. t. macrospilota - Ornate Diamond-backed Terrapin
- M. t. pileata - Mississippi Diamond-backed Terrapin
- M. t. rhizophorarum - Mangrove Diamond-backed Terrapin
- M. t. tequesta - Eastern Florida Diamond-backed Terrapin
- M. t. terrapin - Northern Diamond-backed Terrapin
- Malaclemys terrapin - Diamond-backed Terrapin
- Palea - Wattle-necked Softshells
- Palea steindachneri - Wattle-necked Softshell
- Pelodiscus - Chinese Softshells
- Pelodiscus sinensis - Chinese Softshell
- Pseudemys - Cooters
- Pseudemys alabamensis - Alabama Red-bellied Cooter
- Pseudemys concinna - River Cooter
- P. c. concinna - Eastern River Cooter
- P. c. floridana - Coastal Plain Cooter
- Pseudemys gorzugi - Rio Grande Cooter
- Pseudemys nelsoni - Florida Red-bellied Cooter
- Pseudemys peninsularis - Peninsula Cooter
- Pseudemys rubriventris - Northern Red-bellied Cooter
- Pseudemys suwanniensis - Suwannee Cooter
- Pseudemys texana - Texas Cooter
- Rhinoclemmys - Neotropical Wood Turtles
- Rhinoclemmys areolata - Furrowed Wood Turtle
- Rhinoclemmys pulcherrima - Painted Wood Turtle
- R. p. incisa - Incised Wood Turtle
- R. p. pulcherrima - Guerrero Wood Turtle
- R. p. rogerbarbouri - Western Mexican Wood Turtle
- Rhinoclemmys rubida - Mexican Spotted Wood Turtle
- R. r. perixantha - Colima Wood Turtle
- R. r. rubida - Oaxaca Spotted Wood Turtle
- Staurotypus - Giant Musk Turtles
- Staurotypus salvinii - Pacific Giant Musk Turtle
- Staurotypus triporcatus - Mexican Giant Musk Turtle
- Sternotherus - Musk Turtles
- Sternotherus carinatus - Razor-backed Musk Turtle
- Sternotherus depressus - Flattened Musk Turtle
- Sternotherus minor - Loggerhead Musk Turtle
- S. m. minor - Loggerhead Musk Turtle
- S. m. peltifer - Stripe-necked Musk Turtle
- Sternotherus odoratus - Eastern Musk Turtle
- Terrapene - American Box Turtles
- Terrapene carolina - Eastern Box Turtle
- T. c. bauri - Florida Box Turtle
- T. c. carolina - Eastern Box Turtle
- T. c. major - Gulf Coast Box Turtle
- T. c. mexicana - Mexican Box Turtle
- T. c. triunguis - Three-toed Box Turtle
- T. c. yucatana - Yucatan Box Turtle
- Terrapene coahuila - Coahuilan Box Turtle
- Terrapene nelsoni - Spotted Box Turtle
- T. n. klauberi - Northern Spotted Box Turtle
- T. n. nelsoni - Southern Spotted Box Turtle
- Terrapene ornata - Ornate Box Turtle
- T. o. luteola - Desert Box Turtle
- T. o. ornata - Ornate Box Turtle
- Terrapene carolina - Eastern Box Turtle
- Trachemys - Sliders
- Trachemys gaigeae - Mexican Plateau Slider
- T. g. gaigeae - Big Bend Slider
- T. g. hartwegi - Nazas Slider
- Trachemys nebulosa - Baja California Slider
- T. n. hiltoni - Fuerte Slider
- T. n. nebulosa - Baja California Slider
- Trachemys ornata - Ornate Slider
- Trachemys scripta - Pond Slider
- T. s. elegans - Red-eared Slider
- T. s. scripta - Yellow-bellied Slider
- T. s. troostii - Cumberland Slider
- Trachemys taylori - Cuatrocienegas Slider
- Trachemys venusta - Meso-American Slider
- T. v. cataspila - Huastecan Slider
- T. v. grayi - Gray's Slider
- T. v. venusta - Meso-American Slider
- Trachemys yaquia - Yaqui Slider
- Trachemys gaigeae - Mexican Plateau Slider