• Frederick County - Heritage Frederick
  • Brunswick History Commission
  • Catoctin Furnace Historical Society
  • Emmitsburg Historical Society
  • Middletown Valley Historical Society
  • Myersville - Wolfsville Historical Society
  • Thurmont Historical Society
  • Walkersville Historical Society
  • Woodsboro Historical Society

• Carroll County Historical Society
  • Mount Airy Historical Society
  • Taneytown Heritage & Museum

• Washington County Historical Society
  • Boonsboro Historical Society
  • Hancock Historical Society
  • Sharpsburg Historical Society

• Allegany County Historical Society

• Garrett County Historical Society

• Montgomery County Historical Society

• Howard County Historical Society

• Baltimore County Historical Society

• Maryland Historical Society

• Maryland - List of All Counties

• Hagerstown & Frederick Railway Historical Society
• Railroad Station Historical Society

• Washington, DC Historical Society

• Adams Co, PA Historical Society
• Franklin Co, PA Historical Society
  • Waynesboro Historical Society
• York Co, PA History Center (new name)
  • Hanover Area Historical Society

• Charlestown, Jefferson Co, WV Historical Society

• Loudoun Co, VA - Historic Records
• Winchester, Frederick Co, VA Historical Society