The Historical Society of Harford County welcomes individuals, families, and organizations of all backgrounds, ages, and degrees of interest and involvement. The only requisite for membership is a genuine commitment to the county and its people, and the payment of annual dues. The Society encourages all members to become as active as they can. The Society is run mostly by volunteers. Members get the occasional Bulletin, meeting notices, use of the all Society research collections, admission to the Hays House Museum, Headquarters museum, advanced invitations to Society dinners, programs, and activities, and the Newsletter free.