| SCHOOL | CITY | CHARTER |
| ABERDEEN HS | ABERDEEN | 02/20/1946 |
| BEAR LAKE HS | MONTPELIER | 10/10/1947 |
| BISHOP KELLY HS | BOISE | 02/22/1965 |
| BLACKFOOT HS | BLACKFOOT | 11/06/1930 |
| BOISE HS | BOISE | 02/11/1928 |
| BONNERS FERRY HS | BONNERS FERRY | 12/17/1934 |
| BONNEVILLE HS | IDAHO FALLS | 10/14/1968 |
| BORAH HS | BOISE | 02/20/1963 |
| BUHL HS | BUHL | 09/17/1959 |
| BURLEY HS | BURLEY | 03/30/1934 |
| BUTTE HS | ARCO | 09/27/1982 |
| CALDWELL HS | CALDWELL | 11/14/1929 |
| CAMAS COUNTY HS | FAIRFIELD | 02/28/1975 |
| CAPITAL HS | BOISE | 09/09/1993 |
| CASCADE HS | CASCADE | 10/12/1936 |
| CENTURY HS – ID | POCATELLO | 04/14/2003 |
| CHALLIS HS | CHALLIS | 08/29/1977 |
| COEUR D’ALENE HS | COEUR D’ALENE | 12/14/1926 |
| COUNCIL SCHOOL | COUNCIL | 12/28/1992 |
| DIETRICH HS | DIETRICH | 09/28/1964 |
| EMMETT HS | EMMETT | 02/24/1976 |
| FILER HS | FILER | 02/12/1952 |
| GENESEE JR-SR HS | GENESEE | 09/21/1992 |
| GLENNS FERRY SCHOOL | GLENNS FERRY | 01/18/1936 |
| GOODING HS | GOODING | 03/14/1936 |
| GRANGEVILLE HS | GRANGEVILLE | 11/25/1942 |
| GREENLEAF ACADEMY | GREENLEAF | 03/12/1936 |
| HAGERMAN HS | HAGERMAN | 12/04/1967 |
| HIGHLAND HS | CRAIGMONT | 10/20/1949 |
| HIGHLAND HS | POCATELLO | 04/08/1965 |
| IDAHO FALLS HS | IDAHO FALLS | 03/30/1936 |
| JEROME HS | JEROME | 01/18/1936 |
| KAMIAH HS | KAMIAH | 04/02/1965 |
| KELLOGG HS | KELLOGG | 04/04/1960 |
| KIMBERLY SCHOOLS | KIMBERLY | 02/02/1934 |
| KUNA HS | KUNA | 03/01/1956 |
| LAKELAND HS | RATHDRUM | 03/06/1950 |
| LAPWAI HS | LAPWAI | 10/15/1949 |
| LEWISTON HS | LEWISTON | 02/28/1930 |
| MADISON HS | REXBURG | 12/15/1937 |
| MALAD HS | MALAD CITY | 03/03/1936 |
| MARSH VALLEY HS | ARIMO | 03/14/1961 |
| MCCALL-DONNELLY HS | MCCALL | 03/01/1966 |
| MEADOWS VALLEY HS | NEW MEADOWS | 11/06/1968 |
| MELBA HS | MELBA | 10/30/1950 |
| MERIDIAN HS | MERIDIAN | 11/01/1948 |
| MIDDLETON HS | MIDDLETON | 02/01/1968 |
| MINER HS | WALLACE | 01/03/1939 |
| MINICO HIGH SCHOOL | RUPERT | 01/12/1940 |
| MOSCOW HS | MOSCOW | 05/02/1928 |
| NAMPA HS | NAMPA | 01/07/1929 |
| NEW PLYMOUTH HS | NEW PLYMOUTH | 06/25/1960 |
| NEZPERCE HS | NEZPERCE | 01/31/1966 |
| NOTUS HS | NOTUS | 12/01/1946 |
| OAKLEY HS | OAKLEY | 11/15/1941 |
| OROFINO HS | OROFINO | 11/15/1941 |
| PARMA HS | PARMA | 10/05/1933 |
| PAYETTE HS | PAYETTE | 12/18/1946 |
| PLUMMER HS | PLUMMER | 03/15/1933 |
| POCATELLO HS | POCATELLO | 05/11/1947 |
| POST FALLS CHRISTIAN ACADEMY | POST FALLS | 01/01/1999 |
| POTLATCH HS | POTLATCH | 01/01/1955 |
| PRAIRIE HS | COTTONWOOD | 03/16/1964 |
| PRESTON HS | PRESTON | 10/20/1954 |
| RIGBY HS | RIGBY | 01/30/1941 |
| RIMROCK HS | BRUNEAU | 03/06/1947 |
| RIRIE HS | RIRIE | 01/10/1946 |
| SALMON HS | SALMON | 10/01/1957 |
| SANDPOINT HS | SANDPOINT | 03/25/1939 |
| SKYLINE HS | IDAHO FALLS | 09/21/1972 |
| SNAKE RIVER HS | BLACKFOOT | 01/28/1991 |
| SODA SPRINGS HS | SODA SPRINGS | 04/04/1950 |
| SOUTH FREMONT HS | ST. ANTHONY | 04/17/1997 |
| ST MARIES HS | ST MARIES | 02/17/1931 |
| SUGAR-SALEM HS | SUGAR CITY | 12/05/1938 |
| TETON HS | DRIGGS | 10/20/1950 |
| TIMBERLAKE HS | SPIRIT LAKE | 06/19/2006 |
| TWIN FALLS HS | TWIN FALLS | 03/25/1929 |
| VALLIVUE HS | CALDWELL | 01/31/1994 |
| WEISER HS | WEISER | 10/01/1938 |
| WILDER HS | WILDER | 12/15/1953 |
| WOOD RIVER HS | HAILEY | 01/10/1946 |
