Idaho High School
Activities Association
Formation1925; 95 years ago (1925)
Legal statusAssociation
Purpose/focusAthletic / Educational
Headquarters8011 Ustick Road
LocationBoise, Idaho
Coordinates43°38′01″N 116°16′57″W / 43.6337, -116.2826
Region servedIdaho
Official languagesEnglish
Executive DirectorTy Jones
Assistant DirectorJulie Hammons
AffiliationsNational Federation of State High School Associations

The Idaho High School Activities Association (IHSAA) oversees high school athletics and activities in the state of Idaho. Idaho high schools are classified in five categories, based on enrollment, for league competition and state playoffs and championships.

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.[1]

Classification[edit | edit source]

IHSAA classifications are based on four-year enrollments (grades 9–12).[2]
The classifications for the state's 161 high schools for 2018–20 are:[3]

Classification Enrollment
(gr. 9–12)
Average per
class year
5A 1280 + 320 + 18
4A 640–1279 160–319 29
3A 320–639  80–159 20
2A 160–319 40–79 26
1A, Div. I  100–159 25–39 28
1A, Div. II   0–99  0–25 40
Total 161

Historic classifications[edit | edit source]

Years 5A 4A  3A  2A 1A (I) 1A (II)
2008– 5A 4A 3A 2A 1A (I) 1A (II)
2001–2008 5A 4A 3A 2A 1A (FB: I, II)
2000–2001 A-1 (I) A-1 (II) A-2 A-3 A-4
1984–2000 A-1 (FB: I, II) A-2 A-3 A-4
1963–1984 A-1   A-2     A-3   A-4
1957–1963 AAA AA A
1937–1957 A B
1917–1937 single classification


  • A-1 was split into two divisions for football in fall 1984, all sports in fall 2000 [5]
  • 1A was two divisions for football only; two divisions for volleyball and basketball in fall 2008.

Districts[edit | edit source]

File:Idaho Transportation Department districts.png

District map

District Geographical area
I North
II North Central
III Southwest
IV South Central
V Southeast
VI East

The six districts correspond to those used by the state's transportation department.[6]

5A Conferences[edit | edit source]

High Country Conference (5A) - (east)

Inland Empire League (5A) - (north)

Southern Idaho Conference (5A) - (southwest)

4A Conferences[edit | edit source]

High Country Conference (4A) - (east-VI)

Great Basin Conference - (south central-IV & southeastern-V)

Inland Empire League (4A) - (north-I)

Southern Idaho Conference (4A) - (southwest-III)

3A Conferences[edit | edit source]

Intermountain League - (north)

Mountain Rivers Conference - (east)

Sawtooth Central Conference - (south central)

Snake River Valley Conference - (southwest)

Southeastern Idaho Conference - (southeast)

2A Conferences[edit | edit source]

Canyon Conference - (south central)

Central Idaho League - (north central)

Nuclear Conference - (east)

Southeastern Idaho Conference - (southeast)

Western Idaho Conference - (southwest)

1A Conferences[edit | edit source]

Division I[edit | edit source]

Snake River Conference - (south central)

White Pine League (Div I) - (north central)

Western Idaho Conference - (southwest)

Division II[edit | edit source]

Long Pin Conference - (southwest)

North Side Conference - (south central)

White Pine League (Div II) - (north central)

North Star Conference - (north)

Rocky Mountain Conference - (central)

Neighboring states[edit | edit source]

See also[edit | edit source]

References[edit | edit source]

External links[edit | edit source]

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