St Andrew’s Junior College (SAJC) has its origins in St Andrew’s School, which was founded in 1862 by the Anglican Diocese of Singapore. SAJC is an aided mission school which was started as a vision of faith when the Anglican Church took up the challenge of building a junior college in line with national educational developments in the 1970’s. The Lutheran and Presbyterian Churches also joined in the building project.  The College began in 1978.

SAJC is a two-year co-educational institution that takes in top students from the year’s cohort finishing their Singapore-Cambridge General Certification of Education (GCE) at Ordinary ‘O’ level (the equivalent to Year 10). The College prepares these students for the Singapore-Cambridge General Certification of Education at Advanced ‘A’ level.