W. T. Clarke High School is a high school in Salisbury, New York. It is operated by the East Meadow Union Free School District, also known as the East Meadow School District. The school serves students living in Salisbury, East Meadow, and Levittown, New York. This school was named after Walter Tresper Clarke, who was a former president of the East Meadow School Board.

As of the 2023–2024 school year, the school had an enrollment of 892 students and 81.46 classroom teachers (on an FTE basis), for a student–teacher ratio of 10.95:1. There were 230 students (25.8% of enrollment) eligible for free lunch and 15 (1.7% of students) eligible for reduced-cost lunch.