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Allegheny County Law Library

City-County Building #921, 414 Grant Street
Pittsburgh PA 15219

Building Closed Today

  • Sun. Closed
  • Mon.
  • Tues.
  • Wed.
  • Thurs.
  • Fri.
  • Sat. Closed

The ACLL seeks to make its resources accessible to all users including those with disabilities.  Please email for more information.

Building access – For accessible entrances, elevators and restrooms, please see the City-County Building website. For any area that is not fully accessible, staff assistance is available upon request.

Bus Routes

Many Pittsburgh Regional Transit buses stop near this location. Enter destination "Allegheny County Law Library" into the trip planner to find a route.

All bus routes are subject to change. Please visit the Port Authority of Allegheny County for up-to-date schedules.

Parking Options
  • Meter
  • Garage
  • Bike
About 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.

The Allegheny County Law Library (ACLL) provides legal research services and education
for the public and legal communities.

Visit for more information.

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