Fond du lac is the biggest. Neenah is the 3rd biggest
Muskego
Arrowhead High School in Hartland, WI has an enrollment of 2,251 (per the WIAA website).
Shorewood High School - Wisconsin - was created in 1925.
Watertown High School - Wisconsin -'s motto is 'We are from Watertown, Wisconsin'.
Lodi High School - Wisconsin - was created in 1999.
Germantown High School - Wisconsin - was created in 1957.
Superior High School - Wisconsin - was created in 1965.
Grafton High School - Wisconsin - was created in 1956.
Wisconsin Lutheran High School was created in 1903.
Oregon High School - Wisconsin - was created in 1969.
Luther High School - Wisconsin - was created in 1957.
University of Wisconsin High School was created in 1914.
University of Wisconsin High School ended in 1963.