Connecticut
- Pitkin Tunnel, New Haven
- A road tunnel in Plymouth is an abandoned concrete tunnel about 1 mile (1.6 km) long
- Remains of the Shepaug, Litchfield and Northern Railroad in Washington includes a 235-foot (72 m) long tunnel
- Taft Tunnel, 300 feet (91 m), originally part of Norwich and Worcester Railroad, in Lisbon (oldest active railroad tunnel in the United States)
- Heroes Tunnel of the Wilbur Cross Parkway, West Rock Ridge State Park, in New Haven
Read more about this topic: List Of Tunnels In The United States