Hartford Union High School is one of ten union high schools in the State of Wisconsin, providing a comprehensive high school education to students in grades 9-12, and serves approximately 32,600 residents of the city of Hartford; the village of Neosho; the town of Erin; and a portion of the towns of Addison, Ashippun, Hartford, Herman, Hubbard, Hustisford, Lebanon, Richfield, Rubicon, and Theresa.