Prophetstown High School, or PHS, is a public four-year high school located at 310 West Riverside Drive in Prophetstown, Illinois, a small city of Whiteside County, Illinois, in the Midwestern United States.

The school serves a mixed small city, village, and rural residential community.

[4] In 2009, Prophetstown High School made Adequate Yearly Progress, with 67% of students meeting standards, on the Prairie State Achievement Examination, a state test that is part of the No Child Left Behind Act.

Junior and senior students also have the option of attending the Whiteside Area Career Center (WACC), one of 25 area career centers in Illinois providing technical training in the areas of Business and Related Technology, Consumer Service, Industrial Technology, Transportation Services and Work Experience Cooperative Education.

Sometime in the late 1960s a consolidation effort was initiated with nearby Prophetstown High School.

The gymnasium is still in use, as the home court for the Sterling Christian (located in Galt) Basketball teams.

Declining enrollment and financial concerns led to the closing of Tampico High School in 1996.

The 1921 brick building was torn down during the summer of 2012 as part of a district wide facility improvement plan.. As of 2021, the old football field is still there, along with the padded hitting machine which is now rusted.