Hicksville High School is an American high school in the town of Hicksville, New York, in Nassau County. It is the only high school in the Hicksville Union Free School District (which serves Hicksville as well as parts of Westbury, Jericho, Syosset, Bethpage & Levittown). It opened in 1953.

In the 2016–17 school year, the school had an enrollment of 1,705 students. The principal of the school is Raymond Williams, who became principal in the 2013–2014 school year. It is a co-educational public school and does not have a mandatory dress code.

The student body is 53 percent male and 47 percent female, and the total minority enrollment is 54 percent. The school offers grades 9–12 and special education. With 115 full-time teachers, there is a 15:1 student-teacher ratio. Hicksville High School has a 90% graduation rate. 12% of students are enrolled in the Free Lunch program and 6% are enrolled in the Reduced Price Lunch program.

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40°45′33″N 73°31′33″W / 40.7591°N 73.5257°W / 40.7591; -73.5257