Chester High School is an urban, public high school located in Chester, Delaware County, Pennsylvania, United States with a ZIP code of 19013-4288. Chester, which offers grades 7 through 12, is a part of the Chester-Upland School District. The school serves the City of Chester, Chester Township, and Upland. In 2009-10, the school had 1,302 pupils, with 779 pupils qualifying for a federal free or reduced-price lunch. The school employed 78 teachers yielding a Student/Teacher Ratio of 16.69. In 2011, 26 of the teachers were designated Non‐Highly Qualified Teachers under No Child Left Behind.