A Carnegie library is a library built with money donated by Scottish-American businessman and philanthropist Andrew Carnegie. 2,509 Carnegie libraries were built between 1883 and 1929, including some belonging to public and university library systems. 1,689 were built in the United States, 660 in Britain and Ireland, 125 in Canada, and others in Australia, New Zealand, Serbia, the Caribbean, Mauritius and Fiji.

Few towns that requested a grant and agreed to his terms were refused. When the last grant was made in 1919, there were 3,500 libraries in the United States, nearly half of them built with construction grants paid by Carnegie.^{[citation needed]}