The United Illuminating Company (UI) is an electricity distributor for southern Connecticut. It currently serves roughly 320 000 customers in 17 municipalities in the Greater Bridgeport New Haven and Lower Naugatuck Valley regions. It is a regulated investor-owned electric utility and a subsidiary of UIL Holdings Corporation. Prior to Connecticut's electric deregulation legislation in 1998 UI operated generating plants in Bridgeport and New Haven.
United Illuminating is founded in 1899.
Key person is James P. Torgerson - President & CEO of UIL Holdings Corporation.