The Historical Society of Harford County, Inc. is an organization whose mission is to collect, preserve, present, promote, and interpret the rich and diverse history of the County area, in its regional context, from its prehistoric origins to the present.

The Washington County Historical Society's mission is to develop interest in and preserve the history of Washington County, Maryland. Its kinship Family Heritage Research Center is one of Washington County’s “go-to” spots to learn more about the rich history of the area’s founding, industrial roots, and family ties. The genealogical library houses books, photographs, letters, diaries, maps, and various digital resources to assist visitors on their quest for ancestral information.

The Worcester County Historical Society is dedicated to discovering, preserving and disseminating the rich natural and cultural history of Worcester County and the State of Maryland.