| State | Age | Common name | Binomial nomenclature | Image | Year & Citation |
|---|---|---|---|---|---|
| Alabama | Eocene | Basilosaurus whale |
Basilosaurus cetoides |
 |
1984[1] |
| Alaska | Pleistocene | Woolly Mammoth | Mammuthus primigenius |
 |
|
| Arizona | Triassic | petrified wood |
Araucarioxylon arizonicum |
 |
|
| California | Pleistocene | Saber-toothed cat |
Smilodon fatalis |
 |
|
| Colorado | Jurassic | Stegosaurus | Stegosaurus stenops |
 |
1982 |
| Connecticut | Jurassic | dinosaur tracks |
Eubrontes giganteus |
 |
|
| Delaware | Cretaceous | Belemnite | Belemnitella americana |
 |
|
| Washington, D.C. |
Cretaceous | “Capitalsaurus”
(state dinosaur) |
nomen nudum only |
||
| Florida | Eocene | agatized coral (state stone) |
Cnidaria, Anthozoa |
||
| Georgia | Cretaceous–
Miocene |
shark tooth | undetermined |  |
|
| Idaho | Pliocene | Hagerman horse | Equus simplicidens |
 |
|
| Illinois | Pennsylvanian | Tully Monster | Tullimonstrum gregarium |
 |
|
| Kentucky | Ordovician–
Pennsylvanian |
brachiopod | undetermined |  |
1986[2] |
| Louisiana | Oligocene | petrified palmwood | Palmoxylon |  |
|
| Maine | Devonian | Pertica plant | Pertica quadrifaria |
||
| Maryland | Miocene | murex snail / gastropod |
Ecphora gardnerae gardnerae |
 |
|
| Massachusetts | Jurassic | dinosaur tracks |
undetermined | ||
| Michigan | Holocene | American mastodon |
Mammut americanum |
 |
|
| Mississippi | Eocene | Basilosaurus
and Zygorhiza whales |
Basilosaurus cetoides Zygorhiza kochii |
||
| Missouri | Pennsylvanian | Sea lily | Delocrinus missouriensis |
 |
1989 |
| Montana | Cretaceous | Duck-billed dinosaur |
Maiasaura peeblesorum |
 |
|
| Nebraska | Pleistocene | Woolly Mammoth
Columbian Mammoth Imperial |
Mammuthus primigenius Mammuthus columbi Mammuthus imperator |
||
| Nevada | Triassic | Shonisaurus | Shonisaurus popularis |
 |
|
| New Jersey |
Cretaceous | duck-billed dinosaur |
Hadrosaurus foulkii |
 |
|
| New Mexico |
Triassic | Coelophysis | Coelophysis bauri |
 |
|
| New York | Silurian | sea scorpion | Eurypterus remipes |  |
1984 |
| North Dakota |
Paleocene | shipworm-bored
petrified wood |
Teredo petrified wood |
||
| Ohio | Ordovician | trilobite | Isotelus maximus |
 |
1985 |
| Oklahoma | Jurassic | Saurophaganax | Saurophaganax maximus |
 |
|
| Oregon | Eocene | Dawn redwood |
Metasequoia
occidentalis |
 |
2005 |
| Pennsylvania | Devonian | trilobite | Phacops rana |
 |
1988 |
| South Dakota |
Cretaceous | Triceratops | Triceratops horridus |
 |
|
| Tennessee | Cretaceous | bivalve | Pterotrigonia thoracica |
||
| Texas | Cretaceous | Pleurocoelus
(state dinosaur) |
Pleurocoelus nanus |
||
| Utah | Jurassic | Allosaurus | Allosaurus fragilis |
 |
1988[3] |
| Vermont | Pleistocene | Beluga whale |
Delphinapterus leucas |
 |
1993 |
| Virginia | Caenozoic | scallop | Chesapecten jeffersonius |
 |
1993 |
| Washington | Pleistocene | Columbian Mammoth |
Mammuthus columbi |
 |
1998[4] |
| West Virginia |
Late Pleistocene |
Jefferson’s ground sloth |
Megalonyx jeffersonii |
 |
2008[5] |
| Wisconsin | Ordovician–
Silurian |
trilobite | Calymene celebra |
1985 | |
| Wyoming | Eocene | Knightia | Knightia |  |
1987 |