The first telephone directory is issued in New Haven, Connecticut.

A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a subscriber identified by name and address to be found.

New Haven is a city in the U.S. state of Connecticut. It is located on New Haven Harbor on the northern shore of Long Island Sound. With a population of 135,319 at the 2020 census, it is the third-most populous city in Connecticut and the largest in the South Central Connecticut Planning Region, while the Greater New Haven metropolitan area has an estimated 577,000 residents.