elcome to the online home of The Historical Society of Dauphin County and the John Harris-Simon Cameron Mansion. The Historical Society of Dauphin County (HSDC) was founded in 1869 and has been headquartered at the Harris-Cameron Mansion, a National Historic Landmark, since 1941.

The mission of the HSDC is to collect, preserve, exhibit, publish, and promote interest in the history of Dauphin County for the education, enjoyment, and benefit of the public.

We welcome your interest in our collections, efforts, programs, and services.

Up and Coming at HSDC

Now through May 31: Spring Membership Drive

Now through June 26: Reily Family Portraits Exhibit

May 10: Tea with Maggie Cameron

June 8: Second Sunday Program: History Day Presentations

See More of What's Up and Coming at HSDC

Spring Membership Drive - New Benefits

Join during our Membership Drive by May 31 and you’ll receive 2 additional guest passes to the mansion (a $16 value) for family and friends to use. You will also be entered to win a free rental of the mansion (regularly $150 an hour) for a private event such as a birthday party or bridal shower. Read More...

Download Membership Form

View Membership Benefits

Tea with Maggie Cameron

This Mother's Day weekend you are cordially invited to afternoon tea and an open house at the Harris-Cameron Mansion. The tea will be hosted by Margaretta "Maggie" Cameron, daughter of Simon Cameron, portrayed by re-enactor Elizabeth Dillon. Ms. Dillon will be sharing stories of the Cameron family's travels across Europe, as recorded in Margaretta's diary. Read More...

The Oracle

Check out the latest issue of the Historical Society's newsletter, The Oracle. If you want to catch up on any HSDC news you might have missed, back-issues are also available.

Mansion Renovation Update - Porch Dedication

Thank you to Dauphin County for giving $100,000 towards the renovation of the front porch of the Harris-Cameron Mansion. County Commissioners George Hartwick, III and Mike Pries attended our dedication ceremony and press conference on November 20 along with HSDC board members, staff, and project participants.

Building Harrisburg: The Architects and Builders, 1719-1941

Building Harrisburg Cover

Ken Frew's epic account (400 pages, 350-plus illustrations) of the history of Harrisburg’s architects, builders and buildings is now available for purchase.

Buy "Building Harrisburg" Online

Online Gift Shop

Visit the Gift Shop

Support HSDC while getting something in return. Our online shop includes the Society's journal, Susquehanna Heritage, as well as Publications from the Past, which include transcripts of addresses given before the Society that cover topics such as transportation, industry, military and church histories.


  • Alexander Research Library
  • Monday through Thursday and the Second Sunday of the month
  • 1:00 PM to 4:00 PM
  • Research Information
  • Mansion Tours
  • Monday through Thursday and the Second Sunday of the month
  • Start 1:00 PM, 2:00 PM, & 3:00 PM
  • Tour Information
  • Society Office
  • Monday through Thursday
  • 10:00 AM to 4:00 PM
  • * For research and tour hours
  • please see above information *