Seaford High School is a public high school located in Seaford, New York, United States serving students in the ninth through twelfth grades.

It is in the Seaford Union Free School District.

There were 43 students (5.7% of enrollment) eligible for free lunch and 22 (2.9% of students) eligible for reduced-cost lunch.

On November 22, 2002, a memorial was dedicated to five alumni and other victims of the September 11 terrorist attacks.

[3] Students are able to take classes in a variety of subjects (including Advanced Placement courses) and participate in a number of sports.