Arlington High School is a public high school located in Arlington, Massachusetts. As of 2024, the school enrolled 1,609 students.

In 2019, a town vote approved the phased construction of a new Arlington High School on the footprint of the existing campus. Site work began in 2020, with Phase 1 completed in 2023. The entire project, slated for completion by September 2025, is budgeted at $291 million.

Arlington High has fared well in national school comparisons; in U.S. News' 2024 rankings, it ranked 773rd of 17,655 American public high schools and 31st of 405 in Massachusetts.