Which state of the United States has Hadrosaurus Foulkii as the official state dinosaur?

In 1838, John Estaugh Hopkins was digging in a marl pit on a small tributary of the Cooper River in Haddonfield, New Jersey, and part of the Campanian-age Woodbury Formation when he uncovered large bones, putting them on display at his home, also in Haddonfield. It was the first near-complete dinosaur fossil ever to be discovered in North America.

In 1858, the bones sparked the interest of a visitor, William Parker Foulke. Foulke contacted paleontologist Joseph Leidy, and together they recovered an almost complete set of limbs, along with a pelvis, several parts of the feet, 28 vertebrae (including 18 from the tail), eight teeth and two small parts of the jaw. Foulke and Leidy studied the fossils together, and in 1858, Leidy formally described and named Hadrosaurus Foulkii in honor of his collaborator.

Hadrosaurus Foulkii is believed to have been herbivorous, 7 meters in length, and weigh 2.5 tons. It lived during the Cretaceous Period, 73 million years ago.

In 1994 Hadrosaurus Foulkii was designated the official state dinosaur of New Jersey. It is one of the most celebrated dinosaurs ever and is of great historic importance.