The Fond du Lac County Surveyor's Office has records dating back to 1850 of various land surveys and descriptions done in Fond du Lac County. The duties of the County Surveyor are to maintain these records and the records that have been filed in this office by other surveyors and kept by previous County Surveyors.
The County Surveyor is also in charge of the maintenance of section corners or sometimes referred to 1/2 mile posts throughout the County. The Original Government Survey was completed in Fond du Lac County in 1835. After that, it was the duty of the County Surveyor or Deputy Surveyor to maintain these marks and keep records of there use or remonumentation.