Scott Andrew Trexler II Research Library & Archives
12,000+ Volumes Three Million Documents
Welcome to the Lehigh County Historical Society's Library and Archives. We invite you to explore our excellent collection of local and regional history and extensive genealogy holdings. Here, at one of Pennsylvania's most significant archives, you will find a wealth of resource material for the serious and casual historian and the genealogist: books, maps, newspapers, photographs, oral histories, church and social records, personal and family papers, business documents and numerous county records. To facilitate your research, our reading room offers skilled staff and comfortable quarters.
If you can't travel to our Library, professional research services are available by mail. For more information and a Research Request Form, click here. Most research requests take approximately 6-8 weeks to fulfill.
Tuesday through Friday: 10:00 a.m. – 4:00 p.m. Our Archives close at 3:30.
Saturdays: In addition to our normal hours, this winter and spring the Research Library will be open two Saturdays a month. Our Archives are closed on Saturdays.
The Library will be OPEN:
Saturday, April 7: 10:00 a.m. - 4:00 p.m.
Saturday, April 21: 10:00 a.m. - 4:00 p.m.
Saturday, May 5: 10:00 a.m. - 4:00 p.m.
Saturday, May 19: 10:00 a.m. - 4:00 p.m.
The Library is closed 1:00 p.m. – 1:30 p.m. on Saturdays.
Our Archives are closed on Saturdays.
The Library and Archives are closed Sundays & Mondays.
The Research Library will be closed Friday, March 30 in observance of Good Friday.
In case of inclement weather please call 610-435-1074 to be sure we’re open.
For more information about our collections, click on one of the buttons below: