Idaho High School Activities Association

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.

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


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

5A Conferences
High Country Conference (5A) - (east) Inland Empire League (5A) - (north)
 * Highland Rams - (Pocatello)
 * Madison Bobcats - (Rexburg)
 * Rigby Trojans
 * Thunder Ridge Titans - (Idaho Falls)
 * Coeur d'Alene Vikings
 * Lake City Timberwolves - (Coeur d'Alene)
 * Lewiston Bengals
 * Post Falls Trojans

Southern Idaho Conference (5A) - (southwest)
 * Boise Braves
 * Borah Lions - (Boise)
 * Capital Eagles - (Boise)
 * Centennial Patriots - (Boise, in Meridian based S.D.)
 * Eagle Mustangs
 * Meridian Warriors
 * Mountain View Mavericks - (Meridian)
 * Rocky Mountain Grizzlies - (Meridian)
 * Skyview Hawks - (Nampa)
 * Timberline Wolves - (Boise)

4A Conferences
High Country Conference (4A) - (east-VI) Great Basin Conference - (south central-IV & southeastern-V)
 * Blackfoot Broncos
 * Bonneville Bees - (Idaho Falls)
 * Hillcrest Knights - (Ammon)
 * Idaho Falls Tigers
 * Skyline Grizzlies - (Idaho Falls)
 * Shelley Russets
 * Pocatello Indians
 * Burley Bobcats
 * Canyon Ridge Riverhawks - (Twin Falls)
 * Century Diamondbacks - (Pocatello)
 * Jerome Tigers
 * Minico Spartans - (Rupert)
 * Mountain Home Tigers
 * Preston Indians
 * Twin Falls Bruins
 * Wood River Wolverines - (Hailey)

Inland Empire League (4A) - (north-I) Southern Idaho Conference (4A) - (southwest-III)
 * Lakeland Hawks - (Rathdrum)
 * Moscow Bears
 * Sandpoint Bulldogs
 * Bishop Kelly Knights - (Boise)
 * Caldwell Cougars
 * Columbia Wildcats - (Nampa)
 * Emmett Huskies
 * Kuna Kavemen
 * Middleton Vikings
 * Nampa Bulldogs
 * Ridgevue Warhawks - (Nampa in Vallivue S.D.)
 * Vallivue Falcons - (Caldwell in Vallivue S.D.)

3A Conferences
Intermountain League - (north) Mountain Rivers Conference - (east) Sawtooth Central Conference - (south central)
 * Bonners Ferry Badgers
 * Kellogg Wildcats
 * Priest River Spartans
 * Timberlake Tigers - (Spirit Lake)
 * South Fremont Cougars - (St. Anthony)
 * Sugar-Salem Diggers
 * Teton Redskins - (Driggs)
 * Buhl Indians
 * Filer Wildcats
 * Gooding Senators
 * Kimberly Bulldogs

Snake River Valley Conference - (southwest) Southeastern Idaho Conference - (southeast)
 * Fruitland Grizzlies
 * Homedale Trojans
 * Parma Panthers
 * Payette Pirates
 * Sage International School
 * Weiser Wolverines
 * American Falls Beavers
 * Marsh Valley Eagles - (Arimo)
 * Snake River Panthers - (Blackfoot)

2A Conferences
Canyon Conference - (south central) Central Idaho League - (north central) Nuclear Conference - (east)
 * Declo Hornets
 * Wendell Trojans
 * Coeur d' Alene Charter Panthers
 * Grangeville Bulldogs
 * Orofino Maniacs
 * St. Maries Lumberjacks
 * Firth Cougars
 * North Fremont Huskies - (Ashton)
 * Ririe Bulldogs
 * Salmon Savages
 * West Jefferson Panthers - (Terreton)

Southeastern Idaho Conference - (southeast) Western Idaho Conference - (southwest)
 * Aberdeen Tigers
 * Bear Lake Bears - (Montpelier)
 * Malad Dragons
 * Soda Springs Cardinals
 * West Side Pirates - (Dayton)
 * Cole Valley Christian Chargers - (Meridian)
 * Marsing Huskies
 * McCall-Donnelly Vandals
 * Melba Mustangs
 * Nampa Christian Trojans
 * New Plymouth Pilgrims

Division I
Snake River Conference - (south central) White Pine League (Div I) - (north central)
 * Butte County Pirates - (Arco)
 * Challis Vikings
 * Glenns Ferry Pilots
 * Hagerman Pirates
 * Oakley Hornets
 * Raft River Trojans - (Malta)
 * Shoshone Indians
 * Valley Vikings - (Hazelton)
 * Clearwater Valley Rams - (Kooskia)
 * Genesee Bulldogs
 * Kamiah Kubs
 * Lapwai Wildcats
 * Potlatch Loggers
 * Prairie Pirates - (Cottonwood)
 * Troy Trojans

Western Idaho Conference - (southwest)
 * Ambrose Archers - (Meridian)
 * Compass Aviators - (Meridian)
 * Greenleaf Grizzlies
 * Horseshoe Bend Mustangs
 * Idaho City Wildcats
 * Liberty Charter Patriots - (Nampa)
 * Notus Pirates
 * Rimrock Raiders - (Grand View)
 * Riverstone International Otters - (Boise)
 * Victory Vipers - (Nampa)
 * North Star Huskies - (Eagle)
 * Wilder Wildcats - (Wilder)

Division II
Long Pin Conference - (southwest)


 * Cascade Ramblers
 * Council Lumberjacks
 * Garden Valley Wolverines
 * Gem State Jaguars - (Caldwell)
 * Meadows Valley Mountaineers - (New Meadows)


 * Salmon River Savages - (Riggins)
 * Tri-Valley Titans - (Cambridge/ Midvale/ Indian Valley)

North Side Conference - (south central)
 * Bliss Bears
 * Camas County Musher Dogs - (Fairfield)
 * Carey Panthers
 * Castleford Wolves
 * Community Cutthroat Trout - (Sun Valley)
 * Dietrich Blue Devils
 * Hansen Huskies
 * Lighthouse Christian Lions - (Twin Falls)
 * Murtaugh Red Devils
 * Richfield Tigers

White Pine League (Div II) - (north central) North Star Conference - (north) Rocky Mountain Conference - (central)
 * Culdesac Wolves
 * Deary Mustangs
 * Highland Huskies - (Craigmont)
 * Kendrick Tigers
 * Logos Knights - (Moscow)
 * Nezperce Indians
 * Summit Patriots - (Cottonwood)
 * Timberline Spartans - (Weippe)
 * Clark Fork Wampus Cats
 * Kootenai Warriors
 * Lakeside Knights - (Plummer)
 * Mullan Tigers
 * Wallace Miners
 * Clark County Bobcats - (Dubois)
 * Grace Grizzlies
 * Leadore Mustangs
 * Mackay Miners
 * North Gem Cowboys - (Bancroft)
 * Rockland Bulldogs
 * Sho-Ban Chiefs - (Fort Hall)
 * Grace Lutheran Royals - (Pocatello)

Neighboring states

 * Washington Interscholastic Activities Association
 * Oregon School Activities Association
 * Nevada Interscholastic Activities Association


 * Montana High School Association
 * Wyoming High School Activities Association
 * Utah High School Activities Association