Created in 1982, the Chester County Archives was established to preserve and make available the historic records of Chester County. The archives currently holds over 2,940 volumes and 1,823 cubic feet of original public records of enduring historic and cultural value. Serving over 3,000 researchers a year, the archives is a primary destination for genealogists, property researchers, local historians and academics researching all facets of Chester County history. 

In 1985 the archives expanded to include micrographics and records management sections. To help facilitate the disposal, access, preservation and management of current public records, records management ensures that county departments follow the guidelines established by the state of Pennsylvania and the Pennsylvania Courts. 

The Chester County Archives is administered by the Chester County Historical Society in cooperation with the County of Chester.