The Library's comprehensive Local History Collection is a popular resource for genealogical research.

Pequot Library is home to a significant collection of 19th Century Periodicals, each volume in the original book format.

Collection highlights include Harper’s Weekly (including Winslow Homer’s engravings), Scientific American, and Scientific American Architects and Builders editions. The various titles in the collection are indexed in Poole’s Index to Periodical Literature and The Reader’s Guide to Periodical Literature.