United Service Institution

United Service Institution of India
AbbreviationUSI
Formation1870; 154 years ago (1870)
FounderSir Charles MacGregor
Location
Director
Major General B. K. Sharma AVSM SM
Websitewww.usiofindia.org

United Service Institution of India (USI) is a national security and defence services think tank based in New Delhi, India. It describes its aim as the "furtherance of interest and knowledge in the art, science and literature of the defence services".

USI operates centres for research in various areas of national security. The USI Journal, published quarterly since 1872, is the oldest defence journal in Asia. It also publishes a number of monographs based on research and study by its members.