The Choptank Indian Tribe (or Ababco) was an Algonquian-speaking Native American tribe that historically lived on the Eastern Shore of Maryland on the Delmarva Peninsula. They occupied an area along the lower Choptank River basin, which included parts of present-day Talbot, Dorchester and Caroline counties. The river emptied into the Chesapeake Bay. They spoke Nanticoke, an Eastern Algonquian language closely related to Delaware.