| Official Name: | Fond du Lac County, Wisconsin |
| Settlement Type: | County |
| Image Map1: | Map of USA WI.svg |
| Map Caption1: | Wisconsin's location in the contiguous United States |
| Established Title: | Incorporated |
| Established Date: | 1836 |
| Leader Name: | Sam Kaufman |
| Seat Type: | County seat |
| Seat: | Fond du Lac |
| Seat1 Type: | Largest city |
| Seat1: | Fond du Lac |
| Parts Type: | Municipalities |
| Parts: | 33 (total) |
| Parts Style: | list |
| P1: | 3 cities |
| P2: | 21 towns |
| P3: | 9 villages |
| Government Type: | County |
| Governing Body: | Board of Supervisors |
| Leader Title2: | County Board |
| Leader Name2: | 25 supervisors |
| Area Total Sq Mi: | 766 |
| Area Land Sq Mi: | 720 |
| Area Water Sq Mi: | 46 |
| Area Rank: | 40th largest county in Wisconsin |
| Population Total: | 104154 |
| Population As Of: | 2020 |
| Population Rank: | 16th largest county in Wisconsin |
| Population Density Sq Mi: | 144.7 |
| Population Est: | 103948 |
| Pop Est As Of: | 2023 |
| Blank Name Sec1: | Congressional districts |
| Blank Info Sec1: | 6th |
| Timezone: | Central |
| Utc Offset: | −6 |
| Timezone Dst: | Central |
| Utc Offset Dst: | −5 |
| Website: | www.fdlco.wi.gov |
| Postal Code Type: | ZIP Code |
| Postal Code: | 54971, 53931, 53919, 53946, 53963, 54964, 54932, 54974, 53065, 53006, 54979, 54937, 54935, 53048, 53010, 53040, 53011, 53019, 53057, 53079, 53049, 53061, 53014 |
| Area Code Type: | Area codes |
| Area Code: | 920 |
| Blank Name Sec2: | Interstates |
| Blank Info Sec2: | ---- |
| Blank1 Name Sec2: | U.S. Highways |
| Blank1 Info Sec2: | ---- |
| Blank2 Name Sec2: | State Routes |
| Blank2 Info Sec2: | ---- |
| Blank3 Name Sec2: | Airports |
| Blank3 Info Sec2: | Fond du Lac County Airport---- |
| Blank4 Name Sec2: | Waterways |
| Blank4 Info Sec2: | Fond du Lac River Milwaukee River Rock River Sheboygan River Lake Winnebago |
Fond du Lac County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 104,154.[1] Its county seat is Fond du Lac.[2] The county was created in the Wisconsin Territory in 1836 and later organized in 1844.[3] Fond du Lac is French for "bottom of the lake", given so because of the county's location at the southern shore of Lake Winnebago.[4] [5] [6] Fond du Lac County comprises the Fond du Lac, Wisconsin Metropolitan Statistical Area.[7] The Holyland region is in northeastern Fond du Lac County.
According to the U.S. Census Bureau, the county has a total area of, of which is land and (6.0%) is water.[8]
Fond du Lac County Airport serves the county and surrounding communities.
As of the census of 2020,[9] the population was 104,154. The population density was 144.7PD/sqmi. There were 45,740 housing units at an average density of 63.6/mi2. The racial makeup of the county was 88.0% White, 2.3% Black or African American, 1.2% Asian, 0.5% Native American, 3.0% from other races, and 5.0% from two or more races. Ethnically, the population was 6.4% Hispanic or Latino of any race.
As of the census[10] of 2000, there were 97,296 people, 36,931 households, and 25,482 families residing in the county. The population density was 135/mi2. There were 39,271 housing units at an average density of 54/mi2. The racial makeup of the county was 96.16% White, 0.90% Black or African American, 0.38% Native American, 0.87% Asian, 0.03% Pacific Islander, 0.84% from other races, and 0.82% from two or more races. 2.04% of the population were Hispanic or Latino of any race. 57.7% were of German, 6.1% Irish and 5.3% American ancestry. 95.5% spoke English, 2.1% Spanish and 1.3% German as their first language.
There were 36,931 households, out of which 32.80% had children under the age of 18 living with them, 57.70% were married couples living together, 7.80% had a female householder with no husband present, and 31.00% were non-families. 25.40% of all households were made up of individuals, and 10.80% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.04.
In the county, the population was spread out, with 25.20% under the age of 18, 9.40% from 18 to 24, 28.70% from 25 to 44, 22.40% from 45 to 64, and 14.30% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 95.30 males. For every 100 females age 18 and over, there were 92.20 males.
In 2017, there were 1,066 births, giving a general fertility rate of 57.7 births per 1000 women aged 15–44, the 20th lowest rate out of all 72 Wisconsin counties.[11] Additionally, there were 74 reported induced abortions performed on women of Fond du Lac County residence in 2017.[12]
Fond du Lac has been a historically Republican county, as the party was founded in the town of Ripon, located within the county. It has only voted Democratic in the national landslides of 1964, 1936, and 1932, as well as from 1872 to 1892.