Summary:
Zip code 39520, covering Bay St Louis, Mississippi, is served by a single public high school: Bay High School, which enrolls 491 students in grades 9 through 12 and is part of the Bay Waveland School District, the top-ranked district in Mississippi.
Bay High School stands out as a high performer. It holds a 5-star rating from SchoolDigger and is currently ranked #16 out of 224 Mississippi high schools, putting it in the 93rd percentile. This represents a strong rebound from its 2024–2025 rank of #53. Across every tested subject, the school beats state averages by double digits. In 2025–2026, Algebra I proficiency reached 83.0% (state: 66.0%), Biology proficiency hit 84.5% (state: 63.1%), and English II proficiency was 61.6% (state: 49.3%). These scores also reflect solid year-over-year improvement, with Algebra I up 9.1 points, Biology up 10.5 points, and English II up 3.1 points.
Bay High also graduates its students at a high rate: 94.8% versus the state average of 89.2%. The one area to watch is chronic absenteeism, which sits at 24.3%, slightly above the state's 23.9%. Even so, academic outcomes remain strong despite that trend. Because Bay High is the only high school in the district, its individual scores match district-level figures exactly. The school's performance is especially notable given that no poverty or free-lunch data is available for this period. Overall, Bay High School offers families a top-tier education in a small, focused school setting.
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