The International Organization for Septuagint and Cognate Studies (IOSCS) is an international association of researchers whose main research focus is the study of the Septuagint and related texts.

It was first published as Bulletin of the International Organization of Septuagint and Cognate Studies (BIOSCS), and, since 2011, under the title Journal of Septuagint and Cognate Studies (JSCS), each one in annual volumes.

In addition, the monograph series, edited by Wolfgang Kraus, has been published since 1972.

In addition, the IOSCS participates in the annual meetings of the Society of Biblical Literature.

[1] Since 2011, the IOSCS has awarded the John William Wevers Prize in Septuagint Studies (in honor of John William Wevers) for outstanding research achievements in the field of Septuagint research and related fields.