The New Haven and Northampton Railroad (founded as the New Haven and Northampton Company, also known as the Canal Line) was a railroad originally built alongside a canal between 1847 and 1850 in Connecticut. Leased by the New York and New Haven Railroad from 1849 to 1869, the railroad expanded northwards to Massachusetts and its second namesake city in 1859. Upon the end of the lease in 1869, the company expanded further into Massachusetts, reaching as far north as Shelburne and Turners Falls.