Philadelphia area (including Bucks, Chester, Delaware, and Montgomery Counties) Sanborn Index: Interactive web map showing Sanborn maps of the Philadelphia area. Using this webmap will help you select the correct volume and locate the sheet.
Please email ul-maps@lists.psu.edu for assistance with the following maps still under copyright.
Under copyright until 2023
- Volume 25 1927
- Volume 26 1927
Under copyright until 2024
- Volume 27 1928
Under copyright until 2025
- Volume 28 1929