The Register of Deeds Office is open to genealogy researchers from 7:45am-4:30pm during regular office hours. It is not necessary to make an appointment to search the records.
The Area Research Center on the UW-Oshkosh Campus (Polk Library) has the naturalization and historical records for a five-county region in Wisconsin. These counties are:
Fond du Lac, Dodge, Green Lake, Marquette and Winnebago.
Forrest R Polk Library
University of Wisconsin-Oshkosh
800 Algoma Blvd.
Oshkosh WI 54901
Phone: 920-424-0828 or 920-424-7573
The Fond du Lac Public Library has census records dating back to the mid-1800’s. The Library is located at 32 Sheboygan Street, Fond du Lac WI 54935. Phone: (920) 929-7080
The Adams House Library/Research Center located at 336 Old Pioneer Road, Fond du Lac WI 54935 is also the home of the Fond du Lac County Historical Society. Phone: (920) 922-1166
Wisconsin Historical Society
Wisconsin Department of Health Services – Vital Records