Union Railroad
- American Railway Union
- Channel Tunnel Rail Link
- Chicago and Milwaukee Railway
- Delaware and Hudson Railroad
- Fremont, Lima and Union Railway
- Galena and Chicago Union Railroad
- Indianapolis Union Railway
- International Union of Railways
- Joint railway
- List of Illinois railroads
- List of Indiana railroads
- List of Iowa railroads
- List of Kentucky railroads
- List of Michigan railroads
- List of Minnesota railroads
- List of Missouri railroads
- List of New York Central Railroad precursors
- List of New York railroads
- List of Ohio railroads
- List of Oregon railroads
- List of Pennsylvania railroads
- List of Quebec railways
- List of Rhode Island railroads
- List of Tennessee railroads
- List of Wisconsin railroads
- Montana Union Railway
- North Cambridge Carhouse
- Peoria and Pekin Union Railway
- Spartanburg and Union Railroad
- Streetcars in St. Louis
- Streetcars in Washington, D.C.
- Tulsa-Sapulpa Union Railway
- Union Freight Railroad
- Union Pacific Railroad
- Union Railroad (Brooklyn)
- Union Railroad (Massachusetts freight railway)
- Union Railroad (Pittsburgh)
- Union Railroad of Baltimore
- Union Railway (Bronx)
- Union Station (Ogden, Utah)
- Union Station (disambiguation)
- United Arab Emirates Union Railway