Peoria Heights High School, or PHHS, is a public four-year high school located at 508 East Glen Avenue in Peoria Heights, Illinois, a village in Peoria County, in the Midwestern United States.

The school district lies within the Peoria metropolitan statistical area.

[5] In 2009 Peoria Heights High School did not make Adequate Yearly Progress, with 42% of students meeting standards, on the Prairie State Achievement Examination, a state test that is part of the No Child Left Behind Act.

The PHHS mascot is the Patriots with colors of red, white, and blue.

[4] The school's boys baseball team won the 2017 1A state championship.