Slidell High School

Set in Slidell, Louisiana, Slidell High School is a big 9-12 campus, one of the schools within St. Tammany Parish. It serves 1,654 students across grades 9 through 12. Enrollment runs roughly 133% bigger than the state mean of about 711.

Slidell High School is one of 55 schools operated by St. Tammany Parish, a district that hosts 35,956 students overall.

Looking at the student body, Slidell High School lists that the most-represented group is White (45%), with the rest of the student body spread across multiple groups. The remainder breaks down as 37% Black, 10% Hispanic, 6% multiracial. By comparison, St. Tammany Parish as a whole is about 74% White, so the school skews noticeably less White than its surroundings.

In terms of school funding signals, Staff filings list 116 full-time-equivalent teachers, which works out to roughly 14.3:1 students per teacher. The state averages around 18.0:1, so this campus is tighter than the state norm typical. Around 52% of the student body qualifies for free or reduced-price meals, a number frequently used as a low-income enrollment indicator.

In the area at large, ACS estimates for St. Tammany Parish put median household earnings sit near $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), Slidell High School is one campus in the mix.

The closest other public school is Florida Avenue Elementary School, roughly 0.4 miles away. 8 of the 8 nearest public schools sit inside a five-mile radius.

The campus sits in an urban setting.

Trend over the last 7 years. Looking back 7 years, enrollment at Slidell High School has stayed largely flat, going from 1,691 students in 2018 to 1,654 in 2025. White enrollment moved from 57% to 45% across the same window. Class-load math has tightened: from 19.7:1 in 2018 to 14.3:1 in 2025.

On allk12, posts here usually surface around open house dates, ride-share offers, and field-trip permission slips. Contributors range from current parents to recent graduates and teachers.