The following major energy companies serve most of the residents and businesses in the North East states:
Maine Energy Suppliers
- Central Maine Power
- Bangor Hydro Electric
- Bangor Gas Company
- Maine Natural Gas Company
- Summit Natural Gas
- Unitil
Vermont Energy Suppliers
- Central Vermont Public Service
- Green Mountain Power
- Vermont Gas Systems Inc
New Hampshire Energy Suppliers
- Northeast Utilities
- National Grid
- Liberty Utilities
- Unitil
Massachusetts Energy Suppliers
- NSTAR
- Northeast Utilities
- National Grid
- Eversource Energy
- Columbia Gas of Massachusetts
- Liberty Utilities
- Unitil
Rhode Island Energy Suppliers
- Northeast Utilities
- National Grid
Connecticut Energy Suppliers
- Northeast Utilities
- United Illuminating
- Connecticut Natural Gas
- Eversource Energy
- Southern Connecticut Gas Company
New York Energy Suppliers
- CH Energy Group
- Central Hudson Gas and Electric
- Consolidated Edison
- Long Island Power Authority
- Northeast Utilities
- National Grid
- New York State Electric and Gas
- National Fuel Distribution
Pennsylvania Energy Suppliers
- Northeast Utilities
- Rural Valley Electric Co
- First Energy
- PECO
- Allegheny Power
- PPL
- Valley Energy
- National Fuel Gas Distribution
- Columbia Gas of Pennsylvania
- Philadelphia Gas Works
New Jersey Energy Suppliers
- Atlantic City Electric
- Public Service Electric and Gas Company
- Northeast Utilities
- First Energy
- Jersey Central Power and Light Company
- New Jersey Natural Gas Co
- South Jersey Gas Company
Delaware Energy Suppliers
- Delaware Power & Light