Harbour Tunnel or Harbor Tunnel may refer to:
Australia
edit- Sydney Harbour Tunnel, New South Wales
- Western Harbour Tunnel, New South Wales
Hong Kong
edit- Cross-Harbour Tunnel, Hong Kong
United States
edit- Baltimore Harbor Tunnel and associated Harbor Tunnel Thruway, Maryland
- Cross-Harbor Rail Tunnel in New York Harbor between New York and New Jersey
- Ted Williams Tunnel (also known as Third Harbor Tunnel) in Boston Harbor, Massachusetts