DeForest Area High School  DeForest Area High School is a public high school in DeForest, Wisconsin. Part of the DeForest Area School District, the school serves students in grades 9-12. DeForest Area High School serves more than 1,000 students from the communities of DeForest, Windsor, and parts of Hampden, Leeds, Bristol, Burke, Vienna and portions of Madison and Sun Prairie. The school's colors are purple and gold.