New Haven Harbor
General data
- Name: New Haven Harbor
- Water system: Atlantic Ocean
- Water type: Estuary
- Progression: Long Island Sound -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
New Haven Harbor is an inlet on the north side of Long Island Sound in the U.S. state of Connecticut. Centered on the city of New Haven, the state's third largest, it was carved by the retreat of the glaciers during the last ice age approximately 13,000 years ago.