Northport Public Library is a historic library building located at Northport in Suffolk County, New York. It was designed and built in 1914, with funds provided by the philanthropist Andrew Carnegie. It is one of 3,000 such libraries constructed between 1885 and 1919, and one of 107 in New York State. Carnegie provided $10,000 toward the construction of the Northport library. It is a small masonry structure in the Jacobethan Revival style.