Welcome to the Boise High School Webpage, today is   -   -   Boise High School is one of four public senior high schools in the City of Boise. It is the oldest of the four and is located near the downtown core. Boise High School is a three year comprehensive public senior high school with a current co-educational enrollment of approximately 1,200 students. Boise, Idaho is the state capital and the county seat of Ada County. Boise High School 1010 W. Washington St. Boise ID 83702 NEW Phone (208)-854-4270 NEW Fax (208)-854-4271 Attendance (208)-854-4274 Counselors (208)-854-4360 Enrollment: 1,205+ -