Hagerty High School is a public secondary school in Oviedo, Florida, United States. The school is part of Seminole County Public Schools. It is the academic and athletic rival school of Oviedo High School. In 2015, Hagerty High School was ranked 1st of 18 high schools in the Seminole County Public Schools by U.S. News & World Report.

In 2000, the site of Hagerty High School was Lawton Chiles Middle School. In the fall of 2004, the school moved to its current location at Sanctuary Drive, and construction started on Hagerty, and the school opened a year later in 2005, to help the influx of kids at Oviedo High School.

Hagerty High School has athletic programs in lacrosse, volleyball, tennis, swimming, golf, football, cheerleading, cross country, bowling, weightlifting, track and field, basketball, water polo, soccer, softball, wrestling, robotics and baseball. Hagerty is in the Seminole Athletic Conference.

2,419 students attend HHS. The student body consists of 64.4% White students, 20.3% Hispanic students, 6% Asian students, 5.9% Black students, 2.6% Multi-racial students, 0.6% Pacific Islander students, and 0.2% Native American students. 51% of the students are female, and 49% of the students are male. 11.3% of the students are gifted.

This article's list of alumni may not follow Wikipedia's verifiability policy. Please improve this article by removing names that do not have independent reliable sources showing they merit inclusion in this article AND are alumni, or by incorporating the relevant publications into the body of the article through appropriate citations. (November 2019)

• Jeff Driskel, National Football League (NFL) quarterback
• Zach Eflin, Major League Baseball (MLB) pitcher
• Riley Greene, MLB outfielder
• Vaughn Grissom, MLB infielder
• Matt Lee, college football center
• Ryan Mountcastle, MLB infielder
• Jason Joseph, Professional Lacrosse League (PLL) Defenseman and LSM

• Paul J. Hagerty High School (home page)
• Seminole County Public Schools
• Hagerty High School Robotics Program