Regional Boards are composed of elected municipal and rural area directors.

At present, the Regional District of Okanagan-Similkameen Board is comprised of eighteen directors. Ten municipal directors representing the City of Penticton, the District of Summerland, the Town of Osoyoos, the Town of Oliver, the Town of Princeton and the Village of Keremeos. Eight rural area directors representing Kaleden/Okanagan Falls, Naramata, Okanagan Lake West/West Bench, Keremeos Rural/Hedley, Cawston, Rural Princeton, Rural Oliver and Rural Osoyoos.

This unique representational scheme provides the necessary cross-communication venue to promote co-ordination between the activities of the individual municipalities and the rural areas of the region. The assumption of powers by individual Regional Districts is based upon continued negotiations and dialogue between the Board and the participating municipalities and rural areas.