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 a full Society calendar including open research Saturdays.

Research Library -  click here for specific directions and parking
505 N. Market Street, Wilmington, Delaware 19801

(302) 655-7161

There is no admission charge for using the Research Library, but donations are welcome.  There are fees for certain services.

The Research Library holds rich collections of materials on Delaware history and genealogy.  Many items are cataloged in Ask Caesar, the society's online catalog.  Visit the Collections/Research section of this site for more information on the library's collections.  For genealogy, visit Delaware Genealogy: A Guide to Research at the Delaware Historical Society.

Click here for information on the Research Library policies and procedures.

Delaware History Museum   |  Mitchell Center for African American Heritage   |   Old Town Hall   |   Research Library   |   Willingtown Square    |   Read House & Gardens  

(302) 655-7161
505 N. Market Street, Wilmington, DE 19801
copyright 2018

The Delaware Historical Society is the statewide, non-profit organization that explores, preserves, shares, and promotes Delaware history, heritage, and culture to strengthen our community.