Wauconda is a village in Lake County, Illinois, United States. Per the 2020 census, the population was 14,084. It is the site of the Wauconda Bog Nature Preserve, a National Natural Landmark. Wauconda Community Unit School District 118 serves students from Pre-K through 12th grade who live in Wauconda and surrounding communities (Island Lake, Lakemoor, Volo, and unincorporated sections of McHenry County). Fremont School District 79 also serves students from communities from northern part of Wauconda.

As of the census of 2000, there were 9,448 people, 3,611 households, and 2,404 families residing in the village. The population density was 2,445.0 inhabitants per square mile (944.0/km2). There were 3,822 housing units at an average density of 989.1 per square mile (381.9/km2). The racial makeup of the village was 90.2% White, 0.4% African American, 0.3% Native American, 1.8% Asian, 0.0% Pacific Islander, 6.4% from other races, and 0.9% from two or more races. 11.9% of the population reported being Latino of any race.

There were 3,611 households, out of which 100% had children under the age of 18 living with them, 54.2% were married couples living together, 8.3% had a female householder with no husband present, and 33.4% were non-families. 27.4% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.16.

In the village, the population was spread out, with 25.1% under the age of 18, 7.2% from 18 to 24, 35.8% from 25 to 44, 20.5% from 45 to 64, and 11.4% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 101.9 males. For every 100 females age 18 and over, there were 98.1 males.

The median income for a household in the village was $65,805, and the median income for a family was $56,576. Males had a median income of $64,027 versus $43,125 for females. The per capita income for the village was $40,355. About 2.1% of families and 4.0% of the population were below the poverty line, including 2.1% of those under age 18 and 4.0% of those age 65 or over.