• Color Landform Atlas: Pennsylvania - The Johns Hopkins University hosts this map collection of Pennsylvania.
• Environmental Protection Agency - Pennsylvania - "Surf Your Watershed"
• Historical Maps of Pennsylvania - Twelve maps from the 1700s, 1800s.
• Historical Maps of Pennsylvania - Maps with descriptions and commentary from the 17th through 20th centuries.
• Mapsite: Pennsylvania Maps - Collection of State and major city area maps. Features detailed maps of Philadelphia, Pittsburgh, Harrisburg, Allentown and other major cities.
• Mapthon for Pennsylvania - Find maps of cities, crops, wind directions and other references.
• Pennsylvania Maps - The Perry-Castañeda Library Map Collection.
• Pennsylvania Spatial Data Access - Pennsylvania's official geospatial information clearinghouse and the Commonwealth's node on the National Spatial Data Infrastructure (NSDI).
• Site Atlas - Pennsylvania - Map includes interstate and U.S. highways plus major cities and towns.

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