Long Island Lighting Company
| LILCO Logo of the 1960s and 1990s | |
| Industry | Electric utility | 
|---|---|
| Founded | Long Island, New York (1911) by Ellis Laurimore Phillips & George W. Olmsted | 
| Founder | Ellis Laurimore Phillips | 
| Defunct | 1998 | 
| Fate | Electrical transmission network acquired by LIPA, electrical distribution system and natural gas operations merged with Brooklyn Union Gas to form KeySpan | 
| Successor | Long Island Power Authority, KeySpan | 
| Headquarters | Hicksville, New York, United States | 
| Key people | W. J. Catacosinos, Chairman & CEO, J. T. Flynn, President & COO, A. Nozzolillo Sr. VP-Finance & CFO, T. A. Babcock, Treasurer, K. A. Marion, Corporate Secretary | 
| Products | Electrical & natural gas utility in Nassau, Suffolk and Queens Counties, on Long Island, New York | 
The Long Island Lighting Company, or LILCO ("lil-co"), was an electrical power company and natural gas utility for Long Island, New York, serving 2.7 million people in Nassau, Suffolk and Queens counties, from 1911 until 1998.