Howell High School is a four-year comprehensive public high school serving students in ninth through twelfth grades located in Howell Township in Monmouth County, in the U.S. state of New Jersey, operating as one of six secondary schools of the Freehold Regional High School District. The school serves all students from Farmingdale and those from some portions of Howell Township. The school has been accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools since 1970; the school's accreditation runs through July 2025. Although located in Howell, the school has a Farmingdale mailing address.

As of the 2024–25 school year, the school had an enrollment of 1,775 students and 128.2 classroom teachers (on an FTE basis), for a student–teacher ratio of 13.9:1. There were 275 students (15.5% of enrollment) eligible for free lunch and 40 (2.3% of students) eligible for reduced-cost lunch.

The school hosts the Fine & Performing Arts Center (FPAC) and the Scholars' Center for the Humanities.

Blue and gray are the school colors, although originally all schools in the district had blue and gold as the school colors at least until the late 1970s. This was originally done so the district could attempt to realize some cost savings on uniforms for extracurriculars.