Summary
DeKalb High School is a public high school in Waterloo, Indiana, serving grades 9–12 with about 1,007 students as part of the DeKalb County Ctl United School District in rural northeastern Indiana. In 2025–2026, the school ranked 65th of 415 Indiana high schools — the 84th percentile with 4 stars — well above its district's 52nd percentile ranking. That was its best showing in the years available, continuing a shift from the middle of the pack in the late 2010s into the 75th–84th percentile range in recent years.
Academic outcomes are a clear strength. In 2025–2026, SAT Evidence-based Reading and Writing proficiency was 58.59% (state: 51.9%), SAT Math was 30.84% (state: 25.6%), and Biology was 59.47%, versus the district's 57.5% and a most recent state figure of 45.6%. Among nearby schools, only Carroll High School and Leo Junior/Senior High School score higher in both SAT subjects. DeKalb's overall rank and test scores beat Angola High School, East Noble High School, Prairie Heights Senior High School, Eastside Junior-Senior High School, Garrett High School and Hamilton Community High School. The 2024–2025 graduation rate was 95.7%, above the state's 89.7%, though Garrett, Leo, Eastside, Angola, Prairie Heights and Carroll all reported higher rates.
The main area to watch is chronic absenteeism: at 19.0%, it is above the state's 16.7% and the district's 13.1%, and higher than Carroll (12.8%), Leo (8.0%) and East Noble (13.0%) — yet it has fallen sharply from 49.9% in 2020–2021. Effectiveness for special education students also dropped to the 30th percentile in 2025–2026 from the 70th percentile a year earlier, while low-income students were served at the 74th percentile. DeKalb spends $12,438 per student with a student-teacher ratio of 17.6 — less than several nearby rural districts that post weaker results. Overall, DeKalb is a strong regional performer that trails only Carroll and Leo, both of which serve fewer low-income students.
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