List of New York, New Haven and Hartford Railroad precursors

These railroads were bought, leased, or in other ways had their track come under ownership or lease by the New York, New Haven and Hartford Railroad. The NYNH&H was formed in 1872 as a merge of the New York and New Haven Railroad and Hartford and New Haven Railroad.

Old Colony Railroad 1893

 * Boston and Providence Railroad 1888
 * Stoughton Branch Railroad 1872
 * Boston, Clinton, Fitchburg and New Bedford Railroad 1879
 * Boston, Clinton and Fitchburg Railroad 1876
 * Agricultural Branch Railroad 1869
 * Fitchburg and Worcester Railroad 1869
 * Framingham and Lowell Railroad 1871
 * Mansfield and Framingham Railroad 1870
 * New Bedford Railroad 1875
 * New Bedford and Taunton Railroad 1874
 * Fairhaven Branch Railroad 1868
 * Taunton Branch Railroad 1873
 * Cape Cod Railroad 1872
 * Cape Cod Branch Railroad 1868
 * Cape Cod Central Railroad 1868
 * Duxbury and Cohasset Railroad 1878
 * Fall River, Warren and Providence Railroad 1892
 * Granite Railroad 1870
 * Hanover Branch of Massachusetts Railroad 1887
 * Middleborough and Taunton Railroad 1874
 * Nantasket Beach Railroad 1888
 * Old Colony and Newport Railroad 1872
 * Dighton and Somerset Railroad 1864
 * Easton Branch Railroad 1866
 * Newport and Fall River Railroad 1863
 * Old Colony and Fall River Railroad 1864
 * Fall River Railroad 1854
 * Middleborough Railroad 1895
 * Old Colony Railway 1854
 * Dorchester and Milton Railroad 1847
 * Randolph and Bridgewater Railroad 1845
 * Plymouth and Middleborough Railroad 1892
 * Providence, Warren and Bristol Railroad 1891
 * South Shore Railroad 1876

New England Railroad 1898

 * New York and New England Railroad 1896
 * Boston, Hartford and Erie Railroad 1873
 * Norwich and Worcester Railroad 1869
 * Boston, Norwich and New London Railroad Company 1837
 * Worcester and Norwich Railroad Company 1837
 * Midland Railway 1866
 * Boston and New York Central Railroad 1858
 * Norfolk County Railroad 1853
 * Southbridge and Blackstone Railroad 1853
 * New York and Boston Railroad 1864
 * Charles River Branch Railroad 1855
 * Woonsocket Union Railroad 1858
 * Thompson and Willimantic Railroad 1863
 * Connecticut Central Railroad 1880
 * Springfield and New London Railroad 1876
 * Hartford, Providence and Fishkill Railroad 1878
 * Hartford and Providence Railroad 1849
 * Providence and Plainfield Railroad 1849
 * Rhode Island Railroad 1849
 * Rockville Branch Railroad 1868
 * Meriden, Waterbury and Connecticut River Railroad 1892
 * Meriden and Cromwell Railroad 1889
 * Meriden and Waterbury Railroad 1889
 * Milford and Woonsocket Railroad 1887
 * Hopkinton Railroad 1883
 * Milford, Franklin and Providence Railroad 1883
 * Providence and Springfield Railroad 1890
 * Rhode Island and Massachusetts Railroad 1877
 * Woonsocket and Pascoag Railroad 1890
 * Norwich and Worcester Railroad 1895

Housatonic Railroad 1892

 * Berkshire Railroad 1843
 * Danbury and Norwalk Railroad 1886
 * Danbury Terminal Railroad 1997
 * New Haven and Derby Railroad 1889
 * New York, Housatonic and Northern Railroad 1876
 * Shepaug, Litchfield and Northern Railroad 1891
 * Shepaug Railroad 1887
 * Shepaug Valley Railroad 1873
 * Stockbridge and Pittsfield Railroad 1874
 * West Stockbridge Railroad 1843

Boston and New York Air-Line Railroad 1883

 * New Haven, Middletown and Willimantic Railroad 1875

Central New England Railway 1927

 * Newburgh, Dutchess and Connecticut Railroad 1905
 * Clove Branch Railroad 1896
 * Dutchess and Columbia Railway 1877
 * New York, Boston and Montreal Railway 1874
 * Harlem Extension Railroad 1873
 * Lebanon Springs Railroad 1870
 * New York, Boston and Northern Railway 1873
 * Dutchess and Columbia Railroad 1872
 * Philadelphia, Reading and New England Railroad 1899
 * Central New England and Western Railroad 1892
 * Hartford and Connecticut Western Railroad 1890
 * Connecticut Western Railroad 1881
 * Rhinebeck and Connecticut Railroad 1882
 * Dutchess County Railroad 1892
 * Poughkeepsie and Eastern Railroad 1907
 * New York and Massachusetts Railroad 1893
 * Poughkeepsie, Hartford and Boston Railroad 1887
 * Poughkeepsie and Eastern Railway 1875

Hartford and Connecticut Valley Railroad 1887

 * Connecticut Valley Railroad 1880

New York and New Haven Railroad 1872

 * New Haven and Northampton Railroad 1849
 * Hampshire and Hampden Railroad 1862
 * Holyoke and Westfield Railroad 1870
 * Shore Line Railway 1870
 * New Haven, New London and Stonington Railroad 1868
 * New Haven and New London Railroad 1857
 * New London and Stonington Railroad 1857
 * New York and New London Railroad 1857

Hartford and New Haven Railroad 1872

 * Hartford and Springfield Railroad 1847
 * Middletown Railroad 1850
 * New Britain and Middletown Railroad 1868

Naugatuck Railroad 1887

 * Watertown and Waterbury Railroad 1870

Stamford and New Canaan Railroad 1884

 * New Canaan Railroad 1883

New York, Providence and Boston Railroad 1893

 * Pawtuxet Valley Railroad 1883
 * Pontiac Branch Railroad 1880
 * Providence and Worcester Railroad 1888
 * Warwick Railroad 1879
 * Westerly Granite Railroad 1881