More kinds of dinosaur fossils have been discovered in the United States than in any other country in the world. As of 2010, dinosaur fossils have been found in 35 states. The Southwest and Western Mountain states can claim the most discovery sites, but dinosaur fossils have been found as far north as Alaska, as far east as the mid-Atlantic states and as far south as Alabama.
Of the New England states, Massachusetts and Connecticut are the only states where dinosaur fossils have been found.
In Massachusetts, fossils or tracks of three kinds of dinosaurs have been found: Anchisaurus, Podokesaurus and Theropod.
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In Connecticut, evidence of eight kinds of dinosaurs have been found: Ammosaurus, Anchisaurus, Anchisauripus, Anomoepus, Eubrontes, Gigandipus, Sauropus and Yaleosaurus.
Evidence of dinosaurs -- fossils or tracks -- have been found in all of the Mid-Atlantic states except Delaware.
In New York, tracks of Coelophysis have been found in the Newark Basin.
In Pennsylvania, tracks of Atreipus have been found.
In New Jersey, six kinds of dinosaur fossils have been found: Coelurosaurus, Diplotomodon, Dryptosaurus, Hadrosaurus foulkii, Nodosaurus and Ornithotarsus.
In Maryland, fossils of Astrodon, Pleurocoelus and Priconodon have been found.
North Carolina is the only state in the Appalachian Highlands where dinosaur fossils have been found. Fossil remains of Hypsibema, Lophorhothon and Zatomus have been discovered there.
In Alabama, fossils of Lophorhothon and Nodosaurus have been found.
In Arkansas, fossils of one kind of dinosaur have been found, the appropriately named Arkansaurus.
No dinosaur fossils have been found in Michigan, Wisconsin, Illinois, Indiana and Ohio.
Minnesota has produced fossils of a Hadrosaur.
In Missouri, fossils of three kinds of dinosaurs have been found: Parrosaurus, a small tyrannosaurid (perhaps Albertosaurus) and Hadrosaurs.
In Kansas, fossils of four kinds of dinosaurs have been found: Claosaurus, Hierosaurus, Nodosaurus and Silvisaurus.
In South Dakota, fossils of 13 kinds of dinosaurs have been found: Anatotitan, Camptosaurus, Denversaurus, Edmontosaurus, Hoplitosaurus, Iguanodon, Nanotyrannus, Pachycephalosaurus, Thescelosaurus, Thespesius, Torosaurus, Triceratops prorsus and Tyrannosaurus.
In Oklahoma, fossils of the following dinosaurs have been found: Acrocanthosaurus, Apatosaurus, Epanterias, Pleurocoelus, Sauroposeidon and Tenontosaurus.
In Texas, fossils of the following dinosaurs have been found: Acrocanthosaurus, Alamosaurus, Brontopodus, Camptosaurus, Chasmosaurus, Coelophysis, Deinonychus, Edmontosaurus, Hypsilophodon, Iguanodon, Kritosaurus, Mosasaur, Ornithomimus, Panoplosaurus, Pawpawsaurus, Plesiosaur, Pleurocoelus, Protohadros byrdi, Shuvosaurus, Stegoceras, Technosaurus, Tenontosaurus, Texascetes, Torosaurus and Tyrannosaurus rex.
In New Mexico, fossils of the following dinosaurs have been found: Acrocanthosaurus, Alamosaurus, Brontopodus, Camptosaurus, Chasmosaurus, Coelophysis, Deinonychus, Edmontosaurus, Hypsilophodon, Iguanodon, Kritosaurus, Mosasaur, Ornithomimus, Panoplosaurus, Pawpawsaurus, Plesiosaur, Pleurocoelus, Protohadros byrdi, Shuvosaurus, Stegoceras, Technosaurus, Tenontosaurus, Texascetes, Torosaurus and Tyrannosaurus rex.
In Arizona, fossils of the following dinosaurs have been found: Ammosaurus, Anchisaurus, Anomoepus, Chindesaurus, Coelophysis, Dilophosaurus, Eubrontes, Massospondylus, Navahopus, Revueltosaurus, Rioarribasaurus, Scutellosaurus, Segisaurus, Sonorasaurus and Syntarsus.
All but one Western Mountain state -- Nevada -- have dinosaur fossils.
In Colorado, fossils of the following dinosaurs have been found: Allosaurus, Amphicoelias, Apatosaurus, Brachiosaurus, Camarasaurus, Camptosaurus, Cathetosaurus, Ceratosaurus, Cionodon, Denversaurus, Diplodocus, Dryosaurus, Dystylosaurus, Edmontosaurus, Epanterias, Haplocanthosaurus, Hesperisaurus, Marshosaurus, Nanosaurus, Ornithomimus, Othnielia, Polyonax, Stegosaurus, Supersaurus, Torvosaurus, Triceratops, Tyrannosaurus rex and Ultrasauros.
In Idaho, fossils of Tenontosaurus have been found.
In Montana, fossils of the following dinosaurs have been found: Albertosaurus, Aliwalia, Anatotitan, Ankylosaurus, Apatosaurus, Avaceratops, Bambiraptor, Brachyceratops, Ceratops, Claosaurus, Deinodon, Deinonychus, Diclonius, Diplodocus, Dromaeosaurus, Dysganus, Edmontonia, Edmontosaurus, Einiosaurus, Eucentrosaurus, Hadrosaurus, Hypacrosaurus, Lambeosaurus, Maiasaura peeblesorum , Microvenator, Monoclonius, Montanoceratops, Nanotyrannus, Ornithomimus, Orodromeus, Pachycephalosaurus, Palaeoscincus, Panoplosaurus, Parksosaurus, Pleurocoelus, Sauropelta, Stegoceras, Stygimoloch, Suuwassea, Tenontosaurus, Thescelosaurus, Torosaurus, Trachodon, Triceratops, Troödon, Tyrannosaurus, Ugrosaurus, Zapsailis and Zephyrosaurus.
In Utah, fossils of the following dinosaurs have been found: Alamosaurus, Allosaurus, Amblydactylus, Apatosaurus, Barosaurus, Camarasaurus, Camptosaurus, Cedarosaurus, Coelophysis, Diplodocus, Dryosaurus, Dystrophaeus, Iguanodon, Iliosuchus, Marshosaurus, Nanosaurus, Nedcolbertia, Ornitholestes, Ornithomimus, Othnielia, Parasaurolophus, Planicoxa, Rioarribasaurus, Stegosaurus, Stokesosaurus, Tenontosaurus, Torosaurus, Utahraptor and Venenosaurus.
In Wyoming, fossils of the following dinosaurs have been found: Allosaurus, Ankylosaurus, Camarasaurus, Camptosaurus, Claosaurus, Coelurus, Deinonychus, Diceratops, Diplodocus, Drinker, Dryosaurus, Dyslocosaurus, Edmontosaurus, Gargoyleosaurus, Hesperisaurus, Laosaurus, Leptoceratops, Morosaurus, Nodosaurus, Ornitholestes, Ornithomimus, Othnielia, Pachycephalosaurus, Ricardoestesia, Sauropelta, Stegoceras, Stegopelta, Stegosaurus, Tenontosaurus, Thescelosaurus, Torosaurus, Triceratops horridus, Troödon and Tyrannosaurus.
No dinosaur fossils have been found in Washington or Hawaii.
In Oregon, fossils of Hadrosaur have been found.
California has produced fossils of Hadrosaur and Nodosaurus.
In Alaska, fossils of the following kinds of dinosaurs have been found: Albertosaurus, Ankylosaur, Edmontosaurus, Pachycephalosaurus, Pachyrhinosaurus, Saurornitholestes, Thescelosaurus and Troödon.
