List of U.S. state dinosaurs
This is a list of U.S. state dinosaurs in the United States, including the District of Columbia. Many states also have dinosaurs as state fossils, or designate named avian dinosaurs (List of U.S. state birds), but this list only includes those that have been officially designated as "state dinosaurs".
List of dinosaurs for states and other regions in the US
| State or Territory | Dinosaur | Image | Year |
|---|---|---|---|
| Arizona | Sonorasaurus thompsoni |
 |
2018 |
| Arkansas | Arkansaurus fridayi |
 |
2017 |
| California | Augustynolophus morrisi |
 |
2017 |
| Colorado | Stegosaurus sp. |
 |
1982 |
| Connecticut | Dilophosaurus sp. |
 |
2017-07-10 |
| Delaware | Dryptosaurus aquilunguis |
 |
2022 |
| District of Columbia | "Capitalsaurus" |
 |
1998 |
| Idaho | Oryctodromeus cubicularis |
 |
2023 |
| Massachusetts | Podokesaurus holyokensis |
 |
2021 |
| Maryland | Astrodon johnstoni |
 |
1998 |
| Missouri | Parrosaurus missouriensis |
 |
2004 |
| New Jersey | Hadrosaurus foulkii |
 |
1991 |
| Oklahoma | Acrocanthosaurus atokensis |
 |
2006 |
| Texas | Sauroposeidon proteles (originally Paluxysaurus jonesi) |
 |
2009 (replaced Pleurocoelus which was state dinosaur 1997–2009) |
| Utah | Utahraptor ostrommaysorum |
 |
2018 |
| Washington | "Suciasaurus rex" |
 |
2023 |
| Wyoming | Triceratops horridus |
 |
1994 |
List of candidate dinosaurs
This is for dinosaurs that were or are candidates for state dinosaur but either were not designated or have yet to officially be.
| State | Dinosaur | Image | Year | Result |
|---|---|---|---|---|
| Arizona | Dilophosaurus wetherilli |
 |
1998 | Vetoed when it was revealed fossils were illegally taken from Navajo Nation |
| Massachusetts | Anchisaurus polyzelus |
 |
2021 | Lost to Podokesaurus in a poll taken prior to bill |