The Young Men's Institute Library (also The Institute Library) is a membership library in New Haven, Connecticut. Despite the retention of the library's historic name, membership is open to men and women.
The Institute Library was founded as the Apprentices Literary Association in 1826. The New Haven Young Men's Institute, this literary association's successor institution, was incorporated by the General Assembly of the State of Connecticut in 1841. Its lending collection is now housed in a historic building at 847 Chapel Street in New Haven.
Prominent lecturers at the Young Men's Institute during the 19th century included Wendell Phillips, Henry Ward Beecher, Theodore Parker, Ralph Waldo Emerson, Herman Melville, Cassius M. Clay, and Frederick Douglass.