This is alist of U.S. state dinosaurs in theUnited States, including theDistrict of Columbia. Many states also havedinosaurs asstate 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".
| State or Territory | Dinosaur | Image | Year |
|---|---|---|---|
| Arizona | Sonorasaurus thompsoni |  | 2018[1] |
| Arkansas | Arkansaurus fridayi |  | 2017[2] |
| California | Augustynolophus morrisi |  | 2017[3] |
| Connecticut | Dilophosaurus sp. |  | 2017-07-10[4] |
| Delaware | Dryptosaurus aquilunguis |  | 2022[5][6] |
| District of Columbia | "Capitalsaurus" |  | 1998[7] |
| Idaho | Oryctodromeus cubicularis |  | 2023[8] |
| Massachusetts | Podokesaurus holyokensis |  | 2021[9][10] |
| Maryland | Astrodon johnstoni |  | 1998[11] |
| Missouri | Parrosaurus missouriensis |  | 2004[12][13] |
| New Jersey | Hadrosaurus foulkii |  | 1991[14] |
| Oklahoma | Acrocanthosaurus atokensis |  | 2006[15] |
| Texas | Sauroposeidon proteles (originallyPaluxysaurus jonesi) |  | 2009 (replacedPleurocoelus which was state dinosaur 1997–2009)[16] |
| Utah | Utahraptor ostrommaysorum |  | 2018[17] |
| Washington | "Suciasaurus rex" |  | 2023[18] |
| Wyoming | Triceratops horridus |  | 1994[19] |
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[20][21] | Vetoed when it was revealed fossils were illegally taken fromNavajo Nation[22] |
| Massachusetts | Anchisaurus polyzelus |  | 2021[23] | Lost toPodokesaurus in a poll taken prior to bill[9] |
