Mandeville High School

Set in Mandeville, Louisiana, Mandeville High School is a large secondary school, operated by St. Tammany Parish. It serves 2,006 students across grades 9 through 12. Compared to the state average of about 711 students per school, that is 182% bigger than typical.

St. Tammany Parish comprises 55 schools with combined enrollment of 35,956 students; Mandeville High School is among them.

Looking at the student body, Mandeville High School reports that the student body is overwhelmingly White (80%). Other groups include 8% Hispanic, 7% Black, 2% multiracial.

On the income-and-resources front, Mandeville High School reports 139 full-time-equivalent teachers, putting the student-to-teacher ratio at about 14.4:1. Statewide, the average ratio sits near 18.0:1, putting Mandeville High School tighter than the state norm the norm. An estimated 22% of students are eligible for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. That share is south of St. Tammany Parish's rate of about 44%.

Around the school, ACS estimates for St. Tammany Parish put median household income runs about $81,202, 38% of adults hold a bachelor's degree or higher, and roughly 9% of residents live below the federal poverty line. Across St. Tammany Parish's 56 public schools (combined enrollment of about 36,212 students), Mandeville High School is one campus in the mix.

Nearest neighbor: Pontchartrain Elementary School, around 0.5 miles off. 8 of the 8 nearest public schools sit inside a five-mile radius.

Mandeville High School operates from a high-density location.

Looking at the recent track record. Looking back 7 years, enrollment at Mandeville High School has remained close to its prior level, going from 1,969 students in 2018 to 2,006 in 2025. White enrollment moved from 84% to 80% across the same window. The student-to-teacher ratio tightened from 20.4:1 in 2018 to 14.4:1 today.

Within the allk12 community for this school, the feed for Mandeville High School typically covers pickup logistics, teacher feedback, and after-school programs. Parents, students, alumni, and staff are welcome to weigh in.