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.

New Winter Schedule for January and February

THE JOHN HARRIS-SIMON CAMERON MANSION IS NOW CLOSED TO DAILY PUBLIC TOURS THROUGH MARCH 1, 2016, as we prepare for the Celebration of the 250th anniversary of the building of the mansion by John Harris, Jr., in 1766. 

For group tour and mansion rental information, please contact the Office at 717-233-3462 or office@dauphincountyhistory.org.

The Research Library and Office will remain open in January and February.  Library hours are Monday through Thursday and the second Sunday of the month from 1:00 pm to 4:00 pm.

HSDC Happenings

Find out what's going on at HSDC by checking out our new blog:



The Historical Society of Dauphin County has for sale a two-story office building of 5,950 square feet in the neighborhood of the famous John Harris-Simon Cameron Mansion. The building, located at 311 S. River Street, one-half block from Front Street, includes some unique built ins (it once was an architect's office), bathrooms, kitchen facilities, and 24 parking spaces. The parking lot has rental potential in this busy neighborhood. Please see photos and other details at www.loopnet.com/xNet/Looplink/Profile/Profile.aspx?stid=rsrrealty&LID=19294741 and then call our agent. Thank you!

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.

2014 Annual Report

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

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
  • The Mansion is currently closed to daily public tours through March 1, 2016.
  • Society Office
  • Monday through Thursday
  • 10:00am to 4:00pm
  • * For research and tour hours
  • please see above information *