The 52-year-old Townsend, who succeeded Hugh Yoshida as athletic director at the school eight years ago, will oversee a $100,000 operating budget for the 21-team league.
"I think Dick has the experience to do a great job," said Toyama, who will resign as Kaimuki High athletic director in July to become executive director of the Hawaii High School Athletic Association.
Townsend was an assistant football coach to Yoshida from 1983 to 1986. The Mules won the Prep Bowl championship in 1984.
At Yoshida's request, Townsend served as an assistant to former head coach Gary Clark for the first three years (1987-1989) of his tenure as AD.
Townsend said he's excited about the new 12-team format for the OIA playoffs.
The playoffs have expanded from eight teams. They now include five entries from the Red Conference, four from the White Conference and three from the Blue.
The consolation tournament known as the "Conference Playoffs," has been eliminated.
Ernie Bona, who has been the Sabers' softball coach for the past two seasons, is stepping down due to work schedule obligations, according to Campbell athletic director Duane Izumi.
The Campbell softball team has advanced to postseason play for the past two years under Bona's guidance.
Wayne Nagamine, a varsity baseball assistant last season, will assume the softball post.
John Ng, the Campbell boys' varsity volleyball coach, also is stepping down. No successor has been named as yet, but Izumi said he expects to fill the job within a few weeks.
The Tigers have won four consecutive Southern Collegiate Athletic Conference titles.
LePage was a a 6-foot-6, 230-pound defensive lineman for the Trojans.