The stated mission of Fort Mifflin on the Delaware is to develop, preserve and interpret Fort Mifflin as a National Historic Landmark whose unique history, original fabric and surrounding environment will be protected and used to educate and enrich students and families and serve as a significant regional tourist resource.

Physical and architectural preservation will reflect the period 1777 – 1875. Historical interpretation will be inclusive of the Fort’s service during each of America’s major wars: Revolutionary War, War of 1812, Civil War, World War I and World War II. Environmental interpretation will be inclusive of the Fort’s river setting, wetland habitat and wooded areas.