Fond du Lac County, WI: Cities, ZIP Codes & Population
Fond du Lac County is a county-level area in Wisconsin identified by the FIPS code 55039. Our data lists 15 places in it, led by Fond du Lac, WI, with combined estimates of about 89,165 people across those places. This page shows its cities, ZIP codes, time zone and neighboring counties.
What are the key facts about Fond du Lac County?
| County | Fond du Lac County |
|---|---|
| State | Wisconsin |
| FIPS code | 55039 |
| Places in our data | 15 |
| Places with a city page | 4 |
| Combined place estimates | 89,165 |
| Largest place | Fond du Lac, WI (55,209) |
| Rank in state | 15th of 72 counties by combined place population |
| Weighted density | 2,078 per sq mi |
| Time zone | Central time |
| ZIP codes | 15 |
Which cities and towns are in Fond du Lac County?
Fond du Lac County has 4 places large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Fond du Lac, WI is the largest, followed by Waupun, WI.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Fond du Lac, WI | Incorporated | 55,209 | 2,251 | 3 |
| Waupun, WI | Incorporated | 11,232 | 2,411 | 1 |
| Ripon, WI | Incorporated | 8,040 | 1,575 | 1 |
| North Fond du Lac, WI | Incorporated | 5,081 | 2,393 | 1 |
The county also contains 11 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: Campbellsport, St. Peter, Oakfield, Rosendale, Eden, Brandon, Mount Calvary, Taycheedah, St. Cloud, Fairwater, Van Dyne. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Fond du Lac County compared with other counties in Wisconsin?
Adding up the estimates for the places in our data gives 89,165 people, which ranks Fond du Lac County 15th among 72 counties in Wisconsin. The average listed place has about 5,944 residents. The weighted density is about 2,078 people per square mile, which is suburban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Fond du Lac County?
The places in Fond du Lac County use 15 ZIP codes: 53010, 53019, 53049, 53057, 53065, 53079, 53919, 53931, 53963, 54935, 54936, 54937, 54971, 54974, 54979. Every code begins with 5, which is assigned to the Upper Midwest and northern Plains (Iowa, Minnesota, Montana, the Dakotas and Wisconsin). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Fond du Lac County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Winnebago County, WI — about 24 miles north (center to center), 148,472 people in listed places
- Dodge County, WI — about 25 miles south (center to center), 41,281 people in listed places
- Green Lake County, WI — about 28 miles west (center to center), 9,591 people in listed places
- Calumet County, WI — about 29 miles northeast (center to center), 28,095 people in listed places
- Sheboygan County, WI — about 31 miles east (center to center), 103,100 people in listed places
- Washington County, WI — about 32 miles southeast (center to center), 136,046 people in listed places
What does the FIPS code 55039 mean?
The first two digits, 55, identify Wisconsin, and the last three, 039, identify Fond du Lac County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the Wisconsin hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.