List of U.S. state fossils

Most American states have made a state fossil designation, in many cases during the 1980s. It is common to designate one species in which fossilization has occurred, rather than a single specimen, or a category of fossils not limited to a single species.

Four states (Indiana, Minnesota, New Hampshire, and Rhode Island) lack an explicit state fossil, though Indiana's Salem Limestone is a sedimentary rock that consists of dissolved calcium from both nonbiological and biological sources (such as the accumulation of corals and shells on the seafloor) and also often contains intact fossils.