Friends Christian School was begun as a ministry of Yorba Linda Friends Church in 1975. Preschool classes were offered that first year, a kindergarten class was added the next fall, and the pattern of expansion continued through 1984 when the school included preschool through eighth grade.

In 1984, Rose Drive Friends Church joined as co-sponsor of Friends Christian School, and grades five through eight were offered at the Rose Drive church site. In September of 1985, Little Friends Preschool, which had been founded in 1969 by Rose Drive Friends Church, was integrated into the Friends Christian School system.