印度船级社（IRS）是在国际船级社协会（IACS）于2009年10月引入新的成员标准后第一个加入国际船级社协会的新成员。

自1991年以来，印度船级社就已经成为国际船级社协会准成员。2009年10月，国际船级社进行了重组引入单一成员资格，国际船级社协会准成员分类已经被废除。

Indian Register of Shipping (IRS) is an internationally recognized, independent ship classification society, founded in India in 1975. It is a Non-Profit organisation, Public undertaking and a member of the 13 member International Association of Classification Societies (IACS). It was inducted into IACS along with Croatian Register of Shipping (CRS) and Polish Register of Shipping (PRS).

Being the parent company of Indian Register Quality Systems, Indian Register of Shipping was established as a public limited company in March 1975 and has been providing classification and records of mercantile shipping. In addition, they establish standards and formulate rules for the construction and maintenance of ships, amphibious installation, marine equipment and industrial and general engineering equipment. They also undertake approval of designs, survey and to issue reports on land installations, machinery, materials and apparatus of all kinds.