Atherton International School (AIS) is a privately funded international school located in Okpo, Geoje, South Korea. Founded in 2002 as Okpo International School their name changed to The International School of Koje (ISK) in 2014, before gaining its current name in 2022. Currently, as of 2025, they are accredited for the IEYC, the International Primary Curriculum and the IMYC as well as IGCSEs and A levels.