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About the Allegheny County Law Library

The Allegheny County Law Library (ACLL) was established by Act No. 1212/1867 when the Commonwealth of Pennsylvania directed Allegheny County to use some of the money collected from fines and forfeitures to open a specialized public library. Since then, ACLL has been the only public law library in the county; all residents are welcome to visit the library.

In 1999, Duquesne University took over the management of the ACLL. The university concluded its management contract on June 30, 2023.

Carnegie Library of Pittsburgh (CLP) has partnered with Allegheny County to assume responsibility for the management and operations of the Allegheny County Law Library (ACLL), effective July 3, 2023. This collaboration between CLP and Allegheny County will provide a smooth transition of operations with continued access to resources and services.

ACLL has a membership program designed to offer additional specialized services to the public and the legal profession.

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