Wauconda ( or ) is a village in Lake County, Illinois, United States. The population was 13,603 at the 2010 census. It is the site of the Wauconda Bog Nature Preserve, a National Natural Landmark. Wauconda Community Unit School District 118 serves students from kindergarten through 12th grade who live in Wauconda and surrounding communities (Island Lake, Lakemoor, Volo, and unincorporated sections of McHenry County).