Paul D. Schreiber Senior High School (commonly Paul D. Schreiber High School or Schreiber High School) is a four-year public high school in Port Washington, in Nassau County, New York, United States. It is operated by the Port Washington Union Free School District. As of the 2018–19 school year, the school had an enrollment of 1,637 students and 122.0 classroom teachers (on an FTE basis), for a student–teacher ratio of 13.4:1.