The Delavan-Darien School District boundaries cover a wide portion of southeastern Wisconsin.
The district is primarily in Walworth County, with a small portion stretching into Rock County on the district's far western edge. The district includes portions of the following: the city of Delavan, town of Delavan, village of Darien, town of Darien, town of Richmond, town of Sugar Creek, and the town of Sharon, town of Walworth, and town of Bradford (Rock County).
The district is also part of the Cooperative Educational Service Agency No. 2, which serves schools in Dane, Green, Jefferson, Kenosha, Racine, Rock and Walworth Counties.