Gail (India) Limited (GAIL) (formerly known as Gas Authority of India Limited) is the largest state-owned natural gas processing and distribution company in India. It is headquartered in New Delhi. It has the following business segments: natural gas, liquid hydrocarbon, liquefied petroleum gas transmission, petrochemical, city gas distribution, exploration and production, GAILTEL and electricity generation.

GAIL was conferred with the Maharatna status on 1 Feb 2013, by the Government of India. Only six other Public Sector Enterprises (PSEs) enjoy this coveted status amongst all central CPSEs.

GAIL was listed in the 131st position among India's most trusted brands according to the Brand Trust Report 2014, a study conducted by the Trust Research Advisory.