Strathallan was founded by Harry Riley in 1913, whose philosophy was to offer a uniquely wide-ranging curriculum of "opportunities for all to excel".

[citation needed] In 1920 the school then moved to its present-day campus in Forgandenny which spans 153 acres of rural Perthshire.

[1] The school offers the following courses to Lower and Upper Sixth Form students: Pupils also participate in sport, drama, music, and other extracurricular activities.

[1] The school offers sports including rugby, cricket, field hockey, netball, football, athletics, squash, swimming, tennis, golf, badminton and skiing.

[1] The school organises regular drama productions and a significant number of pupils achieve London Academy of Music and Dramatic Art (LAMDA) awards.