The CSH district straddles Nassau and Suffolk. There is an elementary school in Laurel Hollow which is in Nassau and an elementary school in CSH in Suffolk. The HS is located in CSH as well. When the school was opened in the early 60's, because of their enrollment, they would've competed in a league comprised mostly of schools from the North and South forks and eastern suffolk while there were more similarly sized schools much closer in Nassau hence the decision.