- Mason General Hospital is one of the largest public employers in Mason County. It was first built in 1968 thanks to the generous support of the residents of Mason county. Due to the growing medical needs of the community, an additional 29, 000 square feet were added in 1992. The hospital is part of the Public Hospital District No. 1 which also includes the North Mason Medical Clinic in Belfair ...www.masongeneral.com