IHSAA keeps Indiana boys basketball in four-class system
The IHSAA’s four-class boys basketball map now splits 4A to 1A at 20-25-25-30, with Carmel at 5,200 and Adams Central at 408 showing the gap.
A 13-4-1 vote kept Indiana boys basketball in a four-class system and shifted the top-to-bottom split to 20-25-25-30 beginning with the next reclassification cycle. The change preserved the basic structure fans know while adjusting how schools are grouped, a decision that still shapes tournament paths from December through the state finals.
The Indiana boys tournament was single-class for 87 years before the IHSAA changed it in 1997, ending an era that had defined the sport across the state. The Encyclopedia of Indianapolis says that move transformed the championship into a four-class format similar to those used elsewhere, while the IHSAA’s own history traces the association back to a meeting in Richmond in April 1903, when the first attempt was made to organize Indiana’s high schools under one umbrella.
The modern class structure is not fixed forever. In June 2023, the IHSAA Executive Committee rejected a proposal from the Indiana Interscholastic Athletic Administrators Association that would have used fixed enrollment figures and instead kept a percentage-based system. The committee’s vote, 13-4-1, set the new distribution at 20% for 4A, 25% for 3A, 25% for 2A and 30% for 1A. Before that change, four-class sports had been split evenly, 25% each, since 1997-98.
That matters because the IHSAA uses enrollment figures submitted to the Indiana Department of Education, counting boys and girls in grades 9-12, to classify schools across team sports including baseball, basketball, softball, volleyball, football and soccer. The association says that approach is designed to keep schools aligned across multiple sports, not just basketball, and it gives the class system a broader administrative logic than one tournament bracket at a time.
The published 2024-25 and 2025-26 boys basketball classifications show how the math looks in practice. Carmel is listed at 5,200 students and placed in 4A, while Adams Central is listed at 408 and placed in 2A. Those numbers show the scale the system is trying to manage: schools with vastly different enrollments still chase the same championship, but they do so through brackets built around size and periodic reclassification.
That is why class debates keep coming back. The four-class format was created to balance competition, but it also changes who gets squeezed upward, who stays in a favorable path and how quickly a school’s outlook can shift when enrollment changes. In Indiana, classification is not just a bracket label. It is part of how the road to Gainbridge Fieldhouse gets drawn.
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