International Christian School of Cascais (ICSC), is a member of the Association of Christian Schools International (ACSI).

The school, in partnership with the International Christian Church of Cascais, has served the missionary community and other international families in its current location since 1982. The school offers a North American style education. The Christian component is front and center with Bible taught every day in all classrooms and a chapel service each week.

The school is a non-profit organization established according to Portuguese law and a member of ACSI since 1983. Over the years the school has served students from pre-kindergarten to grade 12.