The children of the first homestead settlers of Hermiston went to school in two rooms at the Carperter's Hall basement on current East Main street.
Students attended in one of two groups, half in the morning, the remaining in the afternoon school.
The high school received a new building in 1954 which was expanded in 1968 and 1992 and rebuilt in the summer of 2002 which almost entirely replaced the one structure built in the same location in the 1930s.
In October 2008, the District put forward a $69.9 million, twenty-year bond measure to retire previous bonds and respond to concerns of aging infrastructure, enrollment growth and quality learning environments.
A sixth elementary school is currently under construction following successful passage of a bond for $82.7 million in November 2019.