Walworth County is located in southeastern Wisconsin. It is one of the oldest and wealthiest counties in the state. The diversified topography has rolling hills, forests, prairies, marshes, meadows, and winding streams. It containing 576 square miles (368,640 acres). There are 24 lakes, the largest being Geneva Lake.

The cities, towns, and villages that comprise Walworth County include: Bloomfield, Darien, Delavan, East Troy, Elkhorn, Fontana, Genoa City, Lafayette, LaGrange, Lake Geneva, Linn, Lyons, Mukwonago, Richmond, Sharon, Spring Prairie, Sugar Creek, Walworth, Williams Bay, and Whitewater.