List of CSX Transportation predecessor railroads

The following railroads merged to form CSX Transportation.

• The Seaboard System Railroad it merged with Baltimore and Ohio Railroad and Chesapeake and Ohio Railroad and Western Maryland Railroad to form CSX Transportation July 1, 1986.
  • The Seaboard Coast Line Railroad merged with the Louisville and Nashville Railroad and Clinchfield Railroad and Atlanta and West Point and Georgia Railroad and Western railway of Alabama to form the Seaboard System Railroad December 29, 1982.
    • The Atlantic Coast Line Railroad merged with the Seaboard Air Line Railroad to form the Seaboard Coast Line Railroad July 1, 1967.
      • The Charleston and Western Carolina Railway merged into the Atlantic Coast Line Railroad December 31, 1959.
    • The Seaboard Air Line Railroad merged with the Atlantic Coast Line Railroad to form the Seaboard Coast Line Railroad July 1, 1967.
    • The Piedmont and Northern Railway merged into the Seaboard Coast Line Railroad July 1, 1969.
  • The Louisville and Nashville Railroad merged with the Seaboard Coast Line Railroad, and Clinchfield Railroad, and Atlanta and West Point Railroad, Georgia Railroad and Western Railway of Alabama to form the Seaboard System Railroad December 29, 1982.
    • The Nashville, Chattanooga and St. Louis Railway merged into the Louisville and Nashville Railroad August 30, 1957.
    • The Monon Railroad merged into the Louisville and Nashville Railroad July 31, 1971.
    • The Chicago and Eastern Illinois Railroad split between the Louisville and Nashville Railroad and Missouri Pacific Railroad October 15, 1976.
  • The Georgia Railroad merged into the Seaboard System Railroad in 1983.
• The Chesapeake and Ohio Railway merged into CSX Transportation August 31, 1987.
  • The Baltimore and Ohio Railroad merged into the CSX Transportation August 31, 1987.
    • The Western Maryland Railway merged with others to form CSX July 1, 1986.
  • The Pere Marquette Railway merged into the Chesapeake and Ohio Railway June 6, 1947.
• The Richmond, Fredericksburg and Potomac Railroad, which was majority-owned by CSX, merged into CSX Transportation in 1991.
• The Pittsburgh and Lake Erie Railroad, of which part had been used by the Baltimore and Ohio Railroad, sold that portion to CSX Transportation in 1991. On September 11, 1992, CSX Transportation bought the rest through the Three Rivers Railway.
• Atlanta and West Point Railroad was merged with the Seaboard Coast Line Railroad, Clinchfield Railroad, Georgia Railroad and Western Railway of Alabama December 29, 1982
• Baltimore and Ohio Chicago Terminal Railroad
• Chessie System
• Clinchfield Railroad
• Western Railway of Alabama was merged with the Seaboard Coast Line Railroad, and Clinchfield Railroad, Atlanta and West Point Railroad, and Georgia Railroad December 29, 1982
• Pennsylvania Railroad merged with New York Central and New Haven to form Penn Central February 1, 1968
  • New York Central merged with Pennsylvania Railroad and New Haven to form Penn Central February 1, 1968
  • Penn Central Transportation Company merged with Erie-Lackawanna and Reading and Lehigh Valley and Central Railroad of New Jersey to form Conrail April 1, 1976
    • New York, New Haven and Hartford Railroad merged with Penn Central December 31, 1968
• Erie Lackawanna Railway merged with Penn Central and Reading and Lehigh Valley and Central Railroad of New Jersey to form Conrail April 1, 1976
  • Erie Railroad merged with Delaware, Lackawanna and Western to form Erie Lackawanna October 17, 1960
  • Delaware, Lackawanna and Western Railroad merged with Erie Railroad to form Erie Lackawanna October 17, 1960
• Ann Arbor Railroad (1895-1976)
• Lehigh Valley Railroad merged with Penn Central and Reading and Erie Lackawanna and Central Railroad of New Jersey to form Conrail April 1, 1976
• Reading Company merged with Penn Central and Lehigh Valley and Lehigh and Hudson River and Erie Lackawanna and Central Railroad of New Jersey to form Conrail April 1, 1976
• Central Railroad of New Jersey merged with Penn Central and Reading and Erie Lackawanna and Lehigh Valley and Lehigh and Hudson River to form Conrail April 1, 1976
• Lehigh and Hudson River Railway merged with Penn Central and Reading and Erie Lackawanna and Central Railroad of New Jersey to form Conrail April 1, 1976
• Pennsylvania Reading Seashore Lines was merged into Conrail April 1, 1976
• Monongahela Railroad was merged into Conrail May 1, 1993
• Conrail Merged into CSX in 1999

CSX system map as of 2009

Error: Not enough coordinates for shape at line 7.