The mission of the OIA is to promote unity and cooperation amongst the member schools in the establishment and administration of policies and regulations for implementing an interscholastic athletic program.
The association shall stress educational and cultural values, promote skills in competitive activities and foster sportsmanship and mutual respect.
The OIA lost the first ever Division I state championship game in 1999 with the St. Louis Crusaders beating the Kahuku Red Raiders 19–0.
Kahuku High School holds the current record for the most appearances (8) and wins (6) in the OIA and the state for the Division I title.
Kahuku is also the current Division I champion after beating Punahou School 42–20 on November 23, 2012.
Teams from the OIA have competed in the Division II State Championship game 6 of the 10 times it was held from 2003 to 2012.
Baseball | Basketball (boys and girls) | Bowling | Cheerleading | Cross Country | Football | Golf | Judo | Paddling | Riflery | Soccer (boys and girls) | Softball | Soft Tennis | Swimming | Tennis | Track and Field | Volleyball (boys and girls) | Water Polo | Wrestling |