Sullivan High School

Sullivan High School is a grades 9–12 public school in Sullivan, Indiana, serving 528 students as the sole high school of the Southwest School Corporation, and it is a consistently upper-half performer in state rankings.

In 2025-2026, Sullivan High School placed 146th of 415 Indiana high schools (65th percentile, 3 stars), notably higher than its district’s 227th of 374 (39th percentile, 2 stars). Its standout strength is attendance: chronic absenteeism is 11.2% and has declined for five straight years, well below the state’s 16.7% and much lower than Linton-Stockton High School (20.3%) and North Knox Junior-Senior High School (23.8%). Reading is also strong. Its SAT Evidence-Based Reading & Writing proficiency is 56.76%, above the state’s 51.9% and the only local school above the state; the next-best peer is nearly 17 points lower. Math is the weak spot: 18.92% proficient, below the state’s 25.6% but still best among the nearby schools, leaving a roughly 38-point reading-to-math gap.

Graduation is a mixed story. The school’s 94.1% rate is above Indiana’s 89.7% and has rebounded from 83.9% in 2022-23, but it ties Shakamak Junior-Senior High School for the lowest among the four nearby high schools—behind Linton-Stockton High School (98.7%), North Knox Junior-Senior High School (97.3%), and North Central Junior/Senior High School (95.1%). Low-income students, about half the student body, rank in the 73rd percentile (4 stars), a notable improvement; special education students are at the 36th percentile (2 stars). The school spends $12,989 per student (2023-24) with a 13.3:1 student-teacher ratio. Overall, Sullivan High School is a stable, upper-half school that outperforms its district and nearby peers, with attendance and reading as strengths and math and graduation completion as areas to watch.