The East Berlin Formation is an Early Jurassic geological formation in New England, United States. Dinosaur footprints and trackways are abundant in this formation. These tracks include Eubrontes (belonging to medium-sized-theropods similar to Dilophosaurus), Anchisauripus (belonging to small theropods like Coelophysis), and Anomoepus (belonging to indeterminate small ornithischians). Several museums, parks, and tourist attractions are based around the East Berlin Formation's dinosaur tracks, including Dinosaur State Park in Rocky Hill, Connecticut and Powder Hill Dinosaur Park in Middlefield, Connecticut.
Although the East Berlin Formation was originally intended to apply to the Hartford Basin of Connecticut and Massachusetts, equivalent strata is found elsewhere in the Newark Supergroup. Equivalent formations include the Waterfall Formation (Culpeper Basin; Virginia, Maryland), Towaco Formation (Newark Basin; New Jersey), White Oaks Formation (Pomperaug Basin, Connecticut), and Turner Falls Sandstone (Deerfield Basin, Massachusetts).
The formation was deposited in an alluvial and lacustrine half-graben succession which was deposited in a climate semi-arid in nature. A 2026 study on certain Eubrontes tracks show that they were made in an area with an ephemeral lake system rather than at the margin of a perennial lake in the Hartfort basin.