Allyn's Point is a location on the Thames River in Ledyard, Connecticut, United States.
It was the southern terminal of the Norwich and Worcester Railroad from 1843 to 1899 and briefly hosted a steamboat connection with the Long Island Rail Road.
The Thames River frequently froze on its northern end, preventing steamboats from accessing the port at Norwich.
To solve this problem, the railroad extended its line six miles (9.7 km) to Allyn's Point, where freezing is less common, in 1843.
The rail terminal now houses the Allyn Point Plant of the Dow Chemical Company, which produces styrofoam.