Please note: The Delaware Historical Society Research Library will be closed through March 1, 2019 for maintenance and special projects. While staff are unable to accept online research requests during this period, researchers can access our online catalog, AskCaesar. For your convenience, the library will remain open at the following times:

Mondays beginning January 28 , 11 a.m. to 7 p.m.
Saturday, January 19 and Saturday, February  16, 10 a.m. to 4 p.m.

Thank you for your patience and continued interest in the Delaware Historical Society. Our library staff looks forward to serving you when we resume normal operating hours on Monday, March 4, 2019.

Closed major holidays - click here for the Society's Calendar of Events including open research Saturdays.

Collecting and preserving Delaware materials for over 150 years, the Society has a rich and varied collection of books, ephemera, newspapers, serials, maps, manuscripts and photographs relating to the history of Delaware and its people. The Society's online catalog includes books, rare books, pamphlets, newspapers, maps, manuscripts, and photograph collections.  Click here for a brief listing of our Library Collections.

Visitors are welcome to use the library free of charge, but there are fees for photocopies, use of digital cameras, etc. - click here for details.

Before your visit, click here for library regulations to help prepare your research.

The library also holds a strong collection of materials for individuals doing genealogical research.  For more information on genealogy at the Society, please see Delaware Genealogy: A Guide to Research at the Delaware Historical Society

Would you like to be a library volunteer? - details

505 N. Market Street, Wilmington, Delaware 19801 - Specific directions and parking

(302) 655-7161