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The Register of Deeds Office is open to genealogy researchers from 8:00am-4:00pm 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. 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