In 1965, Lost Creek High School and West Milford's Unidis High School were consolidated to create South Harrison High School. This new school was a grade 7-12 facility. In the summer of 1996, the Harrison County Board members officially separated South Harrison High School and South Harrison Middle School into two facilities.

In 2006, the Harrison County Board voted and once again placed the high school and middle school under one administration.

Again in 2010, the Harrison County Board members voted to once again split the High School and Middle School into two separate facilities.

SHHS Alma Mater

Hail to thee our Alma Mater,

Hail South Harrison High

Memories of once were near thee,

Never more to die.

Friends we are and the friends we’ll always be

Until the end of time.

Hail to thee our Alma Mater,

Hail South Harrison High.

There you caused our joys – our sorrows

While time has passed us by,

Hail to thee our Alma Mater,