The Public Service Electric and Gas Company (commonly known as PSE&G, and originally known as the Public Service Corporation of New Jersey.) is a regulated, publicly owned gas and electric utility company in the state of New Jersey, USA. It is New Jersey's oldest and largest publicly owned utility.

PSE&G currently serves nearly three quarters of New Jersey's population in a service area consisting of a 2,600-square-mile diagonal corridor across the state from Bergen to Gloucester Counties. PSE&G is the largest provider of gas and electric service, servicing 1.7 million gas customers and 2.1 million electric customers in more than 300 urban, suburban and rural communities, including New Jersey 's six largest cities.

The Public Service Corporation was formed in 1903 by amalgamating more than 400 gas, electric and transportation companies in New Jersey. It was re-named Public Service Electric and Gas Company in 1948. Today, it is called Public Service Enterprise Group Inc..

In June of 2005, the acquisition of PSE&G by Exelon, a Chicago and Philadelphia based utility conglomerate, was approved by the Federal Energy Regulatory Commission. The merger is expected to complete in the second quarter of 2006.