Northeastern United States, Northeast United States or Northeast region within the United States may refer to:

• Northeastern United States, one of four U.S. Census Bureau regions
• Northeast megalopolis, the heavily urbanized area of the U.S. stretching from Boston to Washington
• Northeast Region, an administrative division of the U.S. National Park Service
• Northeast Region (Boy Scouts of America)

• Atlantic Northeast
• Northeast blackout of 2003
• Northeast Climate Science Center
• Northeast Corridor, a fully electrified railway line that serves the Northeast megalopolis of the United States
• Northeast Conference
• Northeast Operating Rules Advisory Committee
• Northeast Regional, an Amtrak rail route
• Northeast Regional Board of Dental Examiners
• Northeast Regional Ocean Council, an organization created to facilitate coastal conservation
• Northeast (disambiguation)
• North Eastern Athletic Conference