The Shepaug, Litchfield and Northern Railroad was a short independent railroad in western Connecticut that was chartered as the Shepaug Valley Railroad in 1868 and operated from 1872 to 1891 when it was taken over by the Housatonic Railroad. In 1898, the Housatonic operation was assumed by the New York, New Haven & Hartford Railroad (NH). As the Litchfield Division of the NH, the line was operated until abandonment in 1948. Much of the line remains as a rail trail.

The Shepaug River is a 26.0-mile-long (41.8 km) river in western Connecticut, in the United States.