Saint Pius X High School was a private, Roman Catholic high school at 844 North Keim Street in Lower Pottsgrove Township, Pennsylvania, United States, northeast of Pottstown.

Saint Pius X High School was established in 1953, moving into the permanent building in 1955.

[citation needed] The school had a capacity of 400, but by 1966 the anticipated number of students was 670, too many students for its designed capacity and about three times its initial enrollment.

On January 28, 2008, the archdiocese announced that a new high school in Upper Providence Township in Montgomery County will replace St. Pius X and Kennedy-Kenrick Catholic High School in Norristown.

[5][6] The new Pope John Paul II High School opened in September 2010.