Monongahela Area Library is a Public library. This library is affiliated with Monongahela Area Library . The collection of the library contains 29,949 volumes. The library circulates 21,749 items per year. The library serves a population of 16,375 residents .

Avella Area Public Library is a Public library. This library is affiliated with Avella Area Public Library . The collection of the library contains 14,876 volumes. The library circulates 9,476 items per year. The library serves a population of 4,209 residents .

Carrick Branch Library is a Public library. This library is affiliated with Carnegie Library of Pittsburgh .

Library for the Blind and Physically Handicapped is a Public library. This library is affiliated with Free Library of Philadelphia .

Pine Center is a Public library. This library is affiliated with Northern Tier Regional Library .

Butler Area Public Library is a Public library. This library is affiliated with Butler Area Public Library . The collection of the library contains 98,136 volumes. The library circulates 381,257 items per year. The library serves a population of 31,005 residents .

Evans City Public Library is a Public library. This library is affiliated with Evans City Public Library . The collection of the library contains 21,748 volumes. The library circulates 19,619 items per year. The library serves a population of 4,758 residents .

Mars Area Public Library is a Public library. This library is affiliated with Mars Area Public Library . The collection of the library contains 26,632 volumes. The library circulates 59,902 items per year. The library serves a population of 19,292 residents .

South Butler Community Library is a Public library. This library is affiliated with South Butler Community Library . The collection of the library contains 20,876 volumes. The library circulates 51,161 items per year. The library serves a population of 7,924 residents .

F D Campbell Memorial Library is a Public library. This library is affiliated with F D Campbell Memorial Library . The collection of the library contains 15,392 volumes. The library circulates 11,772 items per year. The library serves a population of 8,334 residents .