The New Lenox Public Library began in February, 1936 as a volunteer project run by members of the New Lenox Woman's Club, the first home was a small room in Haven School. The library had four other locations before it moved into its own building on Cedar Road in 1975. An addition was completed in 1986 increasing the library's size to 11,500 square feet.
In 1946 a referendum was passed and the tax-supported New Lenox Township Library was created. The library remained a part of the township government until 1987 when it became a library district, an independent unit of local government.
When the library first opened in Haven School in 1936, it housed 385 books. Today, the Library houses more than 130,000 books, over 180 magazines, nearly 5,000 DVDs, 4,000 music CDs, eReaders, downloadable content and much more.
A new building located at 120 Veterans Parkway was constructed and opened on December 10, 2001 to support the expanding population. It is approximately 58,000 square feet and has seating for 176 people. The District's collection has grown to over 150,000 items and the services have expanded to include computer classes, free wi-fi, and more.
The library currently provides services to the approximately 600 people that visit the building each day. In addition, the library offers hundreds of programs each year that are attended by over 10,000 residents.