New Orleans Public Service Incorporated (NOPSI) is a former electric and natural gas utility and mass transit provider that was based in New Orleans, Louisiana.
The various streetcar lines of New Orleans were consolidated under NOPSI's control in 1922. Throughout the 1950s and 1960s, NOPSI converted all the streetcar lines in New Orleans, except for the St. Charles Avenue Line to bus service.
In 1983, control of the system's mass transit was transferred to a public agency, the New Orleans Regional Transit Authority. NOPSI later became Entergy New Orleans, a subsidiary of Entergy Corporation.