South Korean species of the genus Eusterinx Förster are reviewed here. Nine species of the genus Eusterinx are found to occur in South Korea, and five species, Eusterinx (Eusterinx) sp. nov. 1, E. (Holomeristus) sp. nov. 2, E. (Ischyracis) sp. nov. 3, E. (Ischyracis) sp. nov. 4, and E. (Ischyracis) sp. nov. 5, are described as new. A key to all known species of the genus Eusterinx occurring in South Korea is provided.