The following railroads merged to form the Pennsylvania Railroad

Pennsylvania Railroad

The Pennsylvania Railroad was an American Class I railroad, founded in 1846. Commonly referred to as the "Pennsy", the PRR was headquartered in Philadelphia, Pennsylvania....

 (PRR). On February 1, 1968 the PRR merged into Pennsylvania New York Central Transportation.

The following PRR-owned and leased companies were still separate at the time of the Penn Central merger:

• Pennsylvania-Reading Seashore Lines
  Pennsylvania-Reading Seashore Lines
  Pennsylvania-Reading Seashore Lines was a railroad that operated in southern New Jersey in the 20th century. It was created as a joint venture of the Pennsylvania Railroad and the Reading Company .- History :...
  
  
• Baltimore and Eastern Railroad
  • The Baltimore, Chesapeake and Atlantic Railway was conveyed to the Baltimore and Eastern Railroad May 1, 1928.
• Cleveland and Pittsburgh Railroad
• Connecting Railway
  Connecting Railway
  The Connecting Railway was a subsidiary of the Pennsylvania Railroad, incorporated to build a connection between the Philadelphia and Trenton Railroad and the PRR in the city of Philadelphia.-Connecting railway:...
  
  
  • The Pennsylvania, Ohio and Detroit Railroad
    Pennsylvania, Ohio and Detroit Railroad
    The Pennsylvania, Ohio and Detroit Railroad was a railroad company in the U.S. states of Ohio and Michigan that existed from 1926 to 1956. Its sole purpose was to simplify the corporate structure of the Pennsylvania Railroad by merging subsidiaries into a common company leased to the PRR; the PO&D...
    
     merged into the Connecting Railway December 9, 1956.
    • The Cincinnati, Lebanon and Northern Railway, Cleveland, Akron and Cincinnati Railway, Manufacturers Railway, Pennsylvania-Detroit Railroad and Toledo, Columbus and Ohio River Railroad merged into the Pennsylvania, Ohio and Detroit Railroad December 10, 1925.
• Delaware Railroad
• Erie and Pittsburgh Railroad
  Erie and Pittsburgh Railroad
  The Erie and Pittsburgh Railroad was a railroad based in Erie, Pennsylvania incorporated on 1 April 1858. Operations began in March 1860. It operated jointly with Buffalo and State Line Railroad from an indeterminate date until 28 February 1870, in connection with the latter's commitment, along...
  
  
• Little Miami Railroad
  Little Miami Railroad
  The Little Miami Railroad, now defunct, was a railway of southwestern Ohio, running from the eastern side of Cincinnati to Springfield, Ohio. By merging with the Columbus and Xenia Railroad it created the first through rail route from the important manufacturing city of Cincinnati to the state...
  
  
  • The Dayton and Western Railroad merged into the Little Miami Railroad December 27, 1943.
  • The Columbus and Xenia Railroad
    Columbus and Xenia Railroad
    The Columbus and Xenia Railroad was the first railroad to operate in Columbus, Ohio. By merging with the Little Miami Railroad it created the first through rail route from the important manufacturing city of Cincinnati to the state capital, Columbus....
    
     merged into the Little Miami Railroad December 1, 1943.
• Northern Central Railway
  Northern Central Railway
  The Northern Central Railway was a Class I Railroad connecting Baltimore, Maryland with Sunbury, Pennsylvania. Completed in 1858, the line came under the control of the Pennsylvania Railroad in 1861, when the PRR acquired a controlling interest in the Northern Central's stock to compete with the...
  
  
  • The Elmira and Lake Ontario Railroad
    Elmira and Lake Ontario Railroad
    The Elmira and Lake Ontario Railroad was a subsidiary of the Northern Central Railway and later the Pennsylvania Railroad, formed to give the Northern Central an outlet for coal traffic on Lake Ontario.-Horseheads–Canandaigua:...
    
     merged into the Northern Central Railway January 31, 1956.
• Pennsylvania and Atlantic Railroad
• Pennsylvania Tunnel and Terminal Railroad
  Pennsylvania Tunnel and Terminal Railroad
  The New York Tunnel Extension , was a major project of the Pennsylvania Railroad at the beginning of the 20th century, to improve railroad access throughout the greater New York City area...
  
  
• Philadelphia, Baltimore and Washington Railroad
  Philadelphia, Baltimore and Washington Railroad
  The Philadelphia, Baltimore and Washington Railroad was a railroad that operated in Pennsylvania, Delaware, Maryland and the District of Columbia in the 20th century was a key component of the Pennsylvania Railroad system. Its 131 mile main line ran from Philadelphia to Washington...
  
  
  • The Philadelphia, Wilmington and Baltimore Railroad
    Philadelphia, Wilmington and Baltimore Railroad
    The Philadelphia, Wilmington and Baltimore Railroad was the Pennsylvania Railroad's main line from Philadelphia, Pennsylvania southwest to Baltimore, Maryland in the 19th and early 20th centuries...
    
     and the Baltimore and Potomac Railroad were consolidated to form the Philadelphia, Baltimore and Washington Railroad November 1, 1902
  • The Columbia and Port Deposit Railroad
    Columbia and Port Deposit Railroad
    The Columbia and Port Deposit Railroad was a railroad that operated in Pennsylvania and Maryland in the 19th and early 20th centuries. It operated a main line between Columbia, Pennsylvania and Port Deposit, Maryland, generally along the eastern shore of the Susquehanna River. It later acquired...
    
     was purchased by PRR in about 1877 (Pennsylvania portion) and 1890 (Maryland portion). The line was assigned to the Philadelphia, Baltimore, and Washington Railroad May 12, 1893 and formally merged September 15, 1916.
    • The Washington and Maryland Line Railroad, later called the Columbia and Maryland Line Railroad, was merged into the Columbia and Port Deposit Railroad September 27, 1864.
  • The Philadelphia and Baltimore Central Railroad
    Philadelphia and Baltimore Central Railroad
    The Philadelphia and Baltimore Central Railroad was a railroad that operated in Pennsylvania and Maryland in the 19th and early 20th centuries...
    
     merged into the Philadelphia, Baltimore and Washington Railroad September 15, 1916.
  • The Pittsburgh, Cincinnati, Chicago and St. Louis Railroad
    Pittsburgh, Cincinnati, Chicago and St. Louis Railroad
    The Pittsburgh, Cincinnati, Chicago and St. Louis Railroad, commonly called the Pan Handle Route , was a railroad forming part of the Pennsylvania Railroad system. Its common name came from its main line west from Pittsburgh, Pennsylvania across the Northern Panhandle of West Virginia...
    
     merged into the Philadelphia, Baltimore and Washington Railroad April 2, 1956.
    • The Pittsburgh, Cincinnati, Chicago and St. Louis Railway, Anderson Belt Railway, Chicago, Indiana and Eastern Railway, Pittsburgh, Wheeling and Kentucky Railroad and Vandalia Railroad
      Vandalia Railroad (1905-1917)
      The Vandalia Railroad was a railroad from Logansport, Indiana, to South Bend, Indiana. It quickly became a property of the Pennsylvania Railroad , which later became part of Penn Central and then Conrail. The railroad was mostly a freight-carrying route with a hub at Logansport Yard...
      
       merged into the Pittsburgh, Cincinnati, Chicago and St. Louis Railroad January 1, 1917.
  • The Delaware, Maryland and Virginia Railroad merged into the Philadelphia, Baltimore and Washington Railroad January 31, 1956.
• Philadelphia and Erie Railroad
  Philadelphia and Erie Railroad
  The Philadelphia and Erie Railroad was a railroad that operated in Pennsylvania between 1861 and 1907. It was subsequently merged into the Pennsylvania Railroad .-History:...
  
  
• Philadelphia and Trenton Railroad
  Philadelphia and Trenton Railroad
  The Philadelphia and Trenton Railroad was a railroad from Philadelphia, Pennsylvania to Trenton, New Jersey that became part of the Pennsylvania Railroad system. The majority of it is now part of Amtrak's Northeast Corridor.-History:...
  
  
• Pittsburgh, Fort Wayne and Chicago Railway
  Pittsburgh, Fort Wayne and Chicago Railway
  The Pittsburgh, Fort Wayne and Chicago Railway was a major part of the Pennsylvania Railroad system, extending the PRR west from Pittsburgh, Pennsylvania via Fort Wayne, Indiana to Chicago, Illinois...
  
  
• Pittsburgh, Youngstown and Ashtabula Railway
• Shamokin Valley and Pottsville Railroad
• Union Railroad of Baltimore
• United New Jersey Railroad and Canal Company
  United New Jersey Railroad and Canal Company
  The United New Jersey Railroad and Canal Company was part of the Pennsylvania Railroad system in New Jersey, including their main line to New York City...
  
  
  • The Belvidere Delaware Railroad
    Belvidere Delaware Railroad
    The Belvidere Delaware Railroad, frequently shortened to the "Bel Del", was a railroad running along the eastern shore of the Delaware River from Trenton, New Jersey north via Phillipsburg, New Jersey to Belvidere, New Jersey...
    
    , Perth Amboy and Woodbridge Railroad
    Perth Amboy and Woodbridge Railroad
    The Perth Amboy and Wooodbridge Railroad was a railroad operated by the Pennsylvania Railroad. The main line began along the Pennsy main at Rahway, New Jersey. The line was only 6 miles long and was electrified in the year 1935. The line ended at the now closed Essay Tower in South Amboy, New...
    
     and Rocky Hill Railroad and Transportation Company merged into the United New Jersey Railroad and Canal Company January 1, 1958.
  • The New York Bay Railroad merged into the United New Jersey Railroad and Canal Company February 29, 1956.
  • The Harrison and East Newark Connecting Railroad merged into the United New Jersey Railroad and Canal Company December 31, 1954.
  • The Millstone and New Brunswick Railroad
    Millstone and New Brunswick Railroad
    The Millstone and New Brunswick Railroad was chartered in the mid-19th century as a seven-mile long branch line from New Brunswick, New Jersey to East Millstone, New Jersey. Construction was completed and the line began operation on December 19, 1854...
    
     was dissolved and its assets were sold to the United New Jersey Railroad and Canal Company April 21, 1915.
• West Jersey and Seashore Railroad
  West Jersey and Seashore Railroad
  The West Jersey and Seashore Railroad was a Pennsylvania Railroad subsidiary that became part of Pennsylvania-Reading Seashore Lines in 1933.-History:...
  
  

Also existing was the Penndel Company, incorporated in Delaware November 20, 1953 to absorb railroad subsidiaries.

• The Rosslynn Connecting Railroad merged into the Penndel Company December 1, 1969.
• The Elmira and Williamsport Railroad merged into the Penndel Company July 1, 1969.
• The Camden and Burlington County Railway, Cumberland Valley and Martinsburg Railroad, Freehold and Jamesburg Agricultural Railroad
  Freehold and Jamesburg Agricultural Railroad
  The Freehold and Jamesburg Agricultural Railroad was a short-line railroad in New Jersey. Its former right-of-way, along with a portion of the Farmingdale and Squan Village Railroad's right-of-way, has become the Edgar Felix Bikeway and the Freehold right-of-way has become the Henry Hudson Trail...
  
   and New York, Philadelphia and Norfolk Railroad merged into the Penndel Company January 1, 1958.
  • The Cape Charles Railroad merged into the New York, Philadelphia and Norfolk Railroad January 1, 1918.
• The Terre Haute and Peoria Railroad merged into the Penndel Company February 1, 1957.
• The Lykens Valley Railroad and Coal Company merged into the Penndel Company August 31, 1956.
• The Detroit Union Railroad, Depot and Station Company, New Cumberland and Pittsburgh Railway, Western New York and Pennsylvania Railway, Wheeling Coal Railroad and Wheeling and Eastern Railroad merged into the Penndel Company December 31, 1954.
  • The Bradford Railroad merged into the Western New York and Pennsylvania Railroad January 29, 1932.
• The Delaware River Railroad and Bridge Company, Englewood Connecting Railway, Grand Rapids and Indiana Railway, Indianapolis and Frankfort Railroad, Ohio Connecting Railway, Pittsburgh, Ohio Valley and Cincinnati Railroad, South Chicago and Southern Railroad, Southern Pennsylvania Railway and Mining Company, Wheeling Terminal Railway, York, Hanover and Frederick Railway and Youngstown and Ravenna Railway merged into the Penndel Company December 31, 1953.
• The assets of the Louisville Bridge and Terminal Railway were sold to the Penndel Company December 30, 1953.

Dissolved companies

• The New York and Long Island Terminal Railway was dissolved September 29, 1905.
• The Western Washington Railroad was dissolved October 2, 1908.
• The Muskegon, Grand Rapids and Indiana Railroad
  Muskegon, Grand Rapids and Indiana Railroad
  The Muskegon, Grand Rapids and Indiana Railroad is a defunct railroad which operated in Western Michigan. Operating between Grand Rapids and Muskegon, it was the second rail line built into Muskegon. MGR&I was a branch line of the Grand Rapids and Indiana Railroad. The railbed now serves as the...
  
   was dissolved April 24, 1918.
• The Traverse City Railroad was dissolved May 28, 1918.
• The Northern Central Connecting Railway was dissolved April 27, 1925.
• The Barnegat Railroad was dissolved October 8, 1925.
• The Roxborough Railroad was dissolved August 16, 1926.
• The Traverse City, Leelanau and Manistique Railway was dissolved October 31, 1926.
• The Chambersburg and Gettysburg Electric Railway was dissolved December 21, 1926.
• The Canton and East Liverpool Railroad and Massillon and Little Beaver Railroad were dissolved June 3, 1927.
• The Tipton Railroad was dissolved June 8, 1927.
• The Connecting Terminal Railroad was dissolved June 10, 1931.
• The St. Louis Connecting Railroad was dissolved September 24, 1931.
• The Mineral Railroad and Mining Company was dissolved May 17, 1932.
• The Lorain, Ashland and Southern Railroad
  Lorain, Ashland and Southern Railroad
  The Lorain, Ashland, and Southern Railroad operated from 1914-1925 between Lorain, Ohio and Custaloga, Ohio. It was a consolidation of the Ashland and Western Railway and the Lorain and Ashland Railroad...
  
   was dissolved July 12, 1932.
• The Johnsonburg Railroad was dissolved August 22, 1932.
• The Waynesburg and Washington Railroad
  Waynesburg and Washington Railroad
  The Waynesburg and Washington was a narrow gauge line between Washington and Waynesburg, Pennsylvania. It was converted to standard gauge in 1944 and renamed the Waynesburg Secondary. It had steep grades and sharp curves. It had few online industries and was used as an interurban passenger...
  
   was dissolved October 7, 1932.
• The Massillon and Cleveland Railroad was dissolved October 25, 1932.
• The Sharpsville Railroad was dissolved December 17, 1932.
• The Ohio River and Western Railway was dissolved March 15, 1935.
• The Philadelphia and Beach Haven Railroad was dissolved June 24, 1937.
• The Pennsylvania and Newark Railroad was dissolved December 21, 1956.

Unknown merger dates

• Baltimore and Sparrows Point Railroad
• Catonsville Short Line Railroad
• Cincinnati, Richmond and Fort Wayne Railroad
• Maryland, Delaware and Virginia Railway
• Cincinnati and Muskingham Valley railway