International Christian School of Budapest (ICSB) is a private, Christian, co-educational international school in Diósd, Pest, Hungary.

[6] International Christian School of Budapest was established in 1994[2] and was first accredited by the Middle States Association Commissions on Elementary and Secondary Schools (MSA-CESS) in 1999.

[7] The East-West Church and Ministry Report wrote in 1999 that multiple Christian missions have relocated to Budapest because of its strategic location halfway between the Baltic and Adriatic Seas, but added, "One of the major factors for missions relocating regional offices to Budapest has been the development of the International Christian School of Budapest, an accredited program (grades 1-12) with 300 students.

[2] In 2019–20, the school offered eight Advanced Placement courses (Biology, Calculus AB, English Literature and Composition, Human Geography, Macroeconomics and Microeconomics, Physics 1, and Statistics).

[9] As of August 2018[update], it is the only ACT test center in Hungary.