The Idaho High School Activities Association (IHSAA) oversees high school athletics and activities in the U.S. state of Idaho. Idaho high schools are classified in six categories, based on enrollment, for league competition and state playoffs and championships. The IHSAA recognizes twenty specific sports and activities.
Schools primarily compete within their own classification for regular season play, but are allowed to play other schools one classification above or below them in most sports.
IHSAA classifications are based on four-year enrollments (grades 9–12).<br/>The classifications for the state's 171 high schools for 2024âÂÂ26 are:<br/>
Source:
The six districts correspond to those used by the state's transportation department.
District I, Inland Empire League (6A) - (North)
District III, Southern Idaho Conference (6A) - (Southwest)
District IV/V/VI, High Country Conference (6A) - (South Central - Southeast - East)
District I/II, Inland Empire League (5A) - (North)
District III, Southern Idaho Conference (5A) - (Southwest)
District IV, Great Basin Conference - (South Central)
District V, South East Idaho Conference - (Southeast)
District VI, High Country Conference (5A) - (East)
District I, Intermountain League - (North)
District III, Snake River Valley Conference - (Southwest)
District IV, Sawtooth Central Idaho Conference - (South central)
District V, South East Idaho Conference - (Southeast)
District VI, Mountain Rivers Conference - (East)
District I/II, Central Idaho League - (North Central)
District III, Western Idaho Conference - (Southwest)
District IV/V, South East Idaho Conference - (South Central - Southeast)
District VI, Nuclear Conference - (East)
District I, Scenic Idaho Conference - (North)
District II, White Pine League - (North Central)
District III, Western Idaho Conference - (Southwest)
District IV, Snake River Conference - (South Central)
District V/VI, High Desert Conference - (Southeast - East)
District I, North Star League - (North)
District II, Whitepine League - (North Central)
District III, Long Pin Conference - (Southwest)
District IV, Sawtooth Conference - (South Central)
District V/VI, Rocky Mountain Conference - (Southeast - East)