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 Labor Day: Blue Star Museums Program

September 13: A Star Spangled Celebration!

September 14: Star Spangled Banner Program & Gallery Walk Exhibit

September 27: Smithsonian Museum Day

October 12: Second Sunday Program: Historical Societies of Dauphin County

October 31: Mansion Ghost Tours

December 9: Annual Deck the Halls Gala

December 14: Christmas at the Mansion

See More of What's Up and Coming at HSDC

A Star-Spangled Celebration!

View an Animoto video for this event

The Historical Society of Dauphin County welcomes you to a celebration of the 200th anniversary of the Star Spangled Banner! Please join us for a weekend celebration honoring Harrisburg native George J. Heisely and York native Ferdinand Durang's connection to the national anthem and its first performance in 1814. Funding provided by the Dauphin County Commissioners. Read More...

2014 Annual Report

To see the highlights of the Historical Society's 2013-14 fiscal year, please view our Annual Report.

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
  • 1:00pm to 4:00pm
  • Research Information
  • Mansion Tours
  • Monday through Thursday at 1:00pm, 2:00pm and 3:00pm
  • The Second Sunday of each month at 1:00pm
  • Tour Information
  • Society Office
  • Monday through Thursday
  • 10:00am to 4:00pm
  • * For research and tour hours
  • please see above information *