Marshall County High School is a public high school in Lewisburg, Tennessee, and a part of Marshall County Schools. Marshall County High School has 812 students in grades 9-12 with a student-teacher ratio of 18 to 1. The school's square footage is 97,540.
In 1931, students engaged in renovation projects for the school in its old location.
In 2021, Justin Perry became the principal at Marshall County High School. In 2025, Justin Perry was promoted to Director of Schools for the Marshall County School District. The same year, David Steely was soon promoted to be principal of Marshall County High School.
Arnold Quarles Jr. was a longtime educator in Marshall County, who contributed to the county's arts programs. He was the first band director for Jones School in Marshall County, an African-American school during southern segregation. Over 40 years, Quarles had worked at the several schools across the school district (including Cornersville School and Forrest School), until his retirement in 2001. According to the Marshall County Tribune, many students described him as dedicated and rigorous in his leadership for band and music programs. Quarles later served on the Marshall County Community Development Board in his retirement from teaching. His wife, Gloria Quarles, was also a high school teacher and owned a funeral home, which the couple managed together after they had both retired.
The school's student council has been recognized numerous times by the Jostens's Renaissance program, placing the school in Platinum Distinction, the highest level, from 2023 to 2025 based on school culture and achievement.
The Book of Marshall, a local history podcast for Marshall County, is produced by the school's history club.
Marshall County High School has a wide range of extracurriculars. The school fields a multitude of varsity teams, including football, cheer, cross country, volleyball, wrestling, soccer, swim, baseball/softball, bowling, basketball, golf, and tennis teams, known as the Tigers. The school competes under the TSSAA.