Fond du Lac County, Wisconsin
Fond du Lac County is a county in Wisconsin. Its county FIPS code is 55039. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 55039
- Representative coordinates
- 43.754722, -88.493284
- County type
- County
- County seat or government
- Fond du Lac
- Resident population, July 2025
- 104,669
- Land area
- 1,863.667 km²
- Water area
- 119.854 km²
- State
- Wisconsin
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Fond du Lac County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
53006 · 53010 · 53011 · 53014 · 53019 · 53040 · 53048 · 53049 · 53057 · 53061 · 53065 · 53079 · 53919 · 53931 · 53946 · 53963 · 54904 · 54932 · 54935 · 54937 · 54964 · 54971 · 54974 · 54979
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Use the US government local-office directory ↗ to find the office responsible for your address. A county website has not been confidently matched here. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Alto CDP, WI
- Brandon village, WI
- Campbellsport village, WI
- Eden village, WI
- Fairwater village, WI
- Fond du Lac city, WI
- Kewaskum village, WI
- Mount Calvary village, WI
- North Fond du Lac village, WI
- Oakfield village, WI
- Ripon city, WI
- Rosendale village, WI
- St. Cloud village, WI
- St. Peter CDP, WI
- Taycheedah CDP, WI
- Van Dyne CDP, WI
- Waupun city, WI
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.