The New London Northern Railroad was a part of the Central Vermont Railway from New London, Connecticut, north to Brattleboro, Vermont. After a long period with the Canadian National Railway, it is now operated by the New England Central Railroad. The New London Northern was the only through railroad in Connecticut not to come under the control of the New York, New Haven and Hartford Railroad.

The Central Vermont Railway was a railroad that operated in the U.S. states of Connecticut, Massachusetts, New Hampshire, New York, and Vermont, as well as the Canadian province of Quebec.