St. John the Baptist Diocesan High School is a private, Roman Catholic high school in West Islip, New York. It is operated by the Roman Catholic Diocese of Rockville Centre. Address: 1170 Montauk Hwy, West Islip, NY 11795 Tuition: 10,350 USD (2017–2018) Principal: Biagio Arpino CEEB Code: 335898 Founded: 1966: : Website: : : : Category: Place name: : Website: http://stjohnthebaptistdhs.net/ Category: High school Suggest an editUnable to add this file. Please check that it is a valid photo. Unable to add this file. Please check that it is a valid photo. · Own this business?

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