Idaho High School Activities Association


The Idaho High School Activities Association 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.
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Classifications

IHSAA classifications are based on four-year enrollments.
The classifications for the state's 171 high schools for 2024–26 are:

Historic classifications

Source:
  • A-1 was split into two divisions for football in fall 1984, all sports in fall 2000
  • 1A was two divisions for football only; two divisions for volleyball and basketball in fall 2008.

Districts

DistrictGeographical area
INorth
IINorth Central
IIISouthwest
IVSouth Central
VSoutheast
VIEast

The six districts correspond to those used by the state's transportation department.

6A Conferences

District I, Inland Empire League -
District III, Southern Idaho Conference -
District IV/V/VI, High Country Conference -

5A Conferences

District I/II, Inland Empire League -
District III, Southern Idaho Conference -
District IV, Great Basin Conference -
District V, South East Idaho Conference -
District VI, High Country Conference -

4A Conferences

District I, Intermountain League -
District III, Snake River Valley Conference -
District IV, Sawtooth Central Idaho Conference -
District V, South East Idaho Conference -
District VI, Mountain Rivers Conference -

3A Conferences

District I/II, Central Idaho League -
District III, Western Idaho Conference -
District IV/V, South East Idaho Conference -
District VI, Nuclear Conference -

2A Conferences

District I, Scenic Idaho Conference -
District II, White Pine League -
District III, Western Idaho Conference -
District IV, Snake River Conference -
District V/VI, High Desert Conference -

1A Conferences

District I, North Star League -
District II, Whitepine League -
District III, Long Pin Conference -
District IV, Sawtooth Conference -
District V/VI, Rocky Mountain Conference -

Neighboring states