Monday, 11:00 am. - 7:00 p.m.
Tuesday, 9:00 a.m. - 1:00 p.m.
Wednesday - CLOSED
Thursday, 9:00 a.m. - 1:00 p.m.
Friday, 9:00 a.m. - 5:00 p.m.
Open the third Saturday of each month, 10:00 a.m. - 4:00 p.m. (with the exception of December).
Closed major holidays - click here for a full Society calendar
Research Library - click here for specific directions and parking
505 N. Market Street, Wilmington, Delaware 19801
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.