Digitized Brooklyn City Directories
Brooklyn Public Library has digitized Brooklyn city and business directories, and telephone books for the period 1856-1967. This collection is accessible via Internet Archive and allows for full-text searching within each volume.
New York City History
Microfilm copies of Brooklyn City Directories spanning 1796-1933/34 are available in the Milstein Division of United States History, Local History and Genealogy, Stephen A. Schwarzman Building, Room 119.