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| Abbreviation | IHSAA |
|---|---|
| Formation | 1903 |
| Type | Volunteer; NPO |
| Legal status | Association |
| Purpose | Athletic/Educational |
| Headquarters | 9150 Meridian St. Indianapolis, IN 46240 US |
Region served | Indiana |
Membership | 2024-25 Membership[1] 409 Total High School Members 4 Provisional Members |
Official language | English |
Commissioner | Paul Neidig |
Parent organization | National Federation of State High School Associations |
| Affiliations | 51 High School Athletic Conferences |
Budget | 2021-22[2] $11,315,538 |
Volunteers | 18 |
| Website | ihsaa.org |
| Remarks | Phone: (317) 846-6601 Fax: 317-575-4244 |
The Indiana High School Athletic Association (IHSAA) is the arbiter of interscholastic competition among public and private high schools in the U.S. state of Indiana.
Member schools are classified into four classes based on enrollment, ranging from the smallest, 1A, to the largest, 4A. Some sports provide specific classification, such as football (six classes) and soccer (three).
The IHSAA's boys and girls basketball tournaments, sometimes dubbed Hoosier Hysteria, are some of the oldest and best-attended state basketball tournaments in the United States.