
The Brooklyn Public Library (BPL) is the public library system of the New York City borough of Brooklyn. It is the sixth largest public library system in the United States. Like the two other public library systems in New York City, it is an independent nonprofit organization that is funded by the city and state governments, the federal government, and private donors. The library currently promotes itself as Bklyn Public Library.

The Business & Career Library was a branch of the Brooklyn Public Library (BPL), located at 280 Cadman Plaza West in Brooklyn Heights, next to Downtown Brooklyn in New York City. Its history precedes that of the BPL itself. In 1852, prominent citizens established the Brooklyn Athenaeum and Reading Room for the instruction of young men. In 1857, a group of young men established the Brooklyn Mercantile Library Association of the City of Brooklyn, which shared a building with the Athenaeum. The Mercantile Library attempted to be more practical, placing less emphasis on Literature and philosophy. The librarian in charge was Stephen Buttrick Noyes. In 1866, he went to work at the Library of Congress.

The Central Library is the main branch of the Brooklyn Public Library, located at Flatbush Avenue and Eastern Parkway on Grand Army Plaza in Brooklyn, New York City. It contains over a million cataloged books, magazines, and multimedia materials. Each year, over one million people visit the library. The building is a designated New York City landmark.

Interference Archive is a volunteer-run library, gallery, and archive of historical materials related to social and political activism and movements. It is located in the Park Slope neighborhood of Brooklyn, New York City. The mission of the organization is "to explore the relationship between cultural production and social movements."
Kurdish Heritage Foundation of America, also known as Kurdish Library and Museum, was a cultural organization based in Brooklyn, New York. It collected items related to Kurdish culture, literature and history. Its library contained around 3,000 volumes on Kurdish-related subjects.
The Library Of Agudas Chassidei Chabad is a research library owned by Agudas Chasidei Chabad. Its content had been collected by the Chabad-Lubavitch Rebbes. The library is housed next to the Lubavitch world headquarters at 770 Eastern Parkway in Brooklyn, NY, and is utilized by Chabad and general Judaic scholars. It is viewed by thousands of visitors each year.

Macon Library is a branch of the Brooklyn Public Library, located in the Bedford–Stuyvesant neighborhood of Brooklyn, New York City. The branch, opened in 1907, was the borough's eleventh Carnegie library. Richard A. Walker designed Macon in the Classical Revival style and the library was built from red brick and limestone trim with a slate roof at a cost of $93,481. In the 1940s, 1970s, and 2000s, the library underwent major renovations and repairs. Despite the changes, design elements present at the library's opening remain, including some bookshelves, guardrails, and wood paneling. Macon Library houses the African American Heritage Center.

Pratt Institute Libraries is the academic library system of Pratt Institute. The main library is located on the main campus in Brooklyn, NY, with a branch library in Manhattan. The collection focus includes the arts, architecture, design, information science and allied fields. Holdings include 200,000 printed volumes, over 600 periodicals, rare books, digital images resources including Pratt Institute specific Digital Image Collection, and the Institute's archives. It has the distinction of being the “first free public library in Brooklyn” and its Brooklyn building is a New York City designated landmark.