Dinosaurs and other fossils found in Idaho
The Paleobiology Database records 2,322 fossil occurrences of 389 genera in Idaho, United States, including 5 dinosaur genera. Every fossil site is shown on the map; colours show the main group found there. States are as recorded by the Paleobiology Database for each fossil collection.
Dots are fossil collections in the Paleobiology Database on today’s map, merged where closer than about 5 km. See them on the ancient Earth →
What dinosaurs have been found in Idaho?
The Paleobiology Database records 5 dinosaur genera from Idaho. Those with the most fossil records there are Sauropelta, Tenontosaurus.
Dinosaurs found in Idaho (5 genera)
Sauropelta, Tenontosaurus and 3 more genera without a page here: Grallator, Macroelongatoolithus, Otozoum.
Prehistoric birds (20 genera)
Phalacrocorax, Cygnus, Anas, Bucephala, Aquila, Branta, Ciconia, Ardea, Mergus, Gallinula, Agelaius, Pardirallus, Bonasa, Neophrontops · 6 more genera recorded.
Ichthyosaurs (1 genera)
1 more genera recorded.
Crocodile relatives (2 genera)
2 more genera recorded.
Pre-mammals (synapsids) (1 genera)
1 more genera recorded.
Ice Age & later mammals (130 genera)
Trigonictis, Satherium, Hypolagus, Equus, Sorex, Mimomys, Castor, Spermophilus, Odocoileus, Puma, Alilepus, Paenemarmota, Procastoroides, Thomomys, Borophagus, Paramylodon, Hemiauchenia, Plesippus, Bison, Mustela, Homotherium, Scapanus, Megalonyx, Platygonus, Dipoides, Mammuthus, Baiomys, Perognathus, Stegomastodon, Alforjas, Mammut, Lontra, Otospermophilus, Aphelops, Erethizon, Bootherium, Vulpes, Smilodon, Camelops, Dinohippus, Megatylopus, Cormohipparion, Merychyus, Buisnictis, Metalopex, Homo, Lepus, Felis, Cervus, Cynomys, Procyon, Sylvilagus, Gomphotherium, Arctodus, Megantereon, Miohippus, Epicyon, Palaeolagus, Hypohippus, Simocyon, Diceratherium, Antilocapra, Brachycrus, Oxydactylus, Archaeohippus, Cimolodon, Rhynchotherium, Megacamelus, Mesoreodon, Protolabis, Acritohippus, Cosoryx, Protarctos, Aenocyon, Martinogale, Bryceomys, Michenia, Ticholeptus, Cedaromys, Paracimexomys, Basirepomys · 49 more genera recorded.
Ancient fish & sharks (4 genera)
Helicoprion · 3 more genera recorded.
Ammonites & nautiloids (94 genera)
Orthoceras · 93 more genera recorded.
Trilobites & sea scorpions (55 genera)
55 more genera recorded.
Ediacaran & Cambrian life (77 genera)
Elrathia, Orthotheca · 75 more genera recorded.
Fossil occurrences: Paleobiology Database (CC0 as reported by the API; CC BY 4.0 policy), downloaded 23 October 2026. Genus pages quote Wikipedia (CC BY-SA 4.0).