UIL
# UIL

UIL may mean:

* UIL Holdings Corporation, a natural gas company based in Connecticut, U.S.
* UNESCO Institute for Lifelong Learning, a United Nations educational centre
* Unione Italiana del Lavoro, the Italian Labour Union
* United International Airlines, ICAO designator of a Serbian cargo airline
* United Irish League, a nationalist political party in Ireland from 1898 through the 1920s
* University Interscholastic League, the governing body for public school interscholastic activities in the US state of Texas
* User-in-the-loop, a system theoretic paradigm to change user behavior
* User Interface Language, an X11 application language used by Motif
* Uil River, a river of Kazakhstan
