in what county is wheaton il
DuPage County History. Located in the county seat of DuPage County, Illinois, Wheaton Public Library maintains a local history collection. Included are city histories for towns and cities of DuPage County, biographies of local and well-known figures of DuPage County and atlases. Resources for tracing family history in DuPage County as well as the publications of the DuPage County Genealogical Society are found here.