 At the 2010 decennial United States Census, the population was 7,374, approximately half what it was in 1950.The first human settlement of Shamokin was probably Shawnee natives migrants.A large population of Delaware Indians (also known as the Lenapes) were also forcibly resettled there in the early 18th century after they lost rights to their land in the "Walking Purchase" (also known as the "Walking Treaty") along the eastern border of the colonial Province of Pennsylvania in the upper northern reaches of the Delaware River in 1737.