Union Railway (New York), street railway in New York City

Union Railway and Transit Company, St. Louis, Missouri

Detroit Union Railroad Depot and Station Company, Detroit, Michigan

Minneapolis Union Railway, Minneapolis, Minnesota

Union Railroad (Massachusetts street railway), street railway in the Boston area

Union Railroad Transfer and Stock Yards Company, a belt line around Indianapolis, Indiana

Union Railway (Tennessee), belt line around Memphis

Union Railroad (Rhode Island), street railway in Providence

Fort Wayne Union Railway, Fort Wayne, Indiana

Wisconsin Union Railroad, Milwaukee, Wisconsin to Illinois state line

Dayton Union Railway, Dayton, Ohio

Chattanooga Union Railway, Chattanooga, Tennessee

Spartanburg and Union Railroad, Alston to Spartanburg, South Carolina

Union Railroad (Maryland), part of the Pennsylvania Railroad system in Baltimore

Des Moines Union Railway, Des Moines, Iowa

Portland Union Railway Station, Portland, Maine

Union Railroad (Oregon), part of the Union Pacific Railroad system

Troy Union Railroad and Depot, Troy, New York

Union Railroad (Ohio), part of the Baltimore and Ohio Railroad system

Western Union Railroad, Racine, Wisconsin to Savannah and Port Byron

Baltimore Coal and Union Railroad, part of the Delaware and Hudson Railroad system

Union Railway (Pennsylvania), street railway in Chester

Union Railroad (New York), short part of the Erie Railroad system from Suffern to New Jersey

Ogden Union Railway and Depot, Ogden, Utah

Rock River Valley Union Railroad, state line to Fond du Lac, Wisconsin

Gadsden and Attala Union Railroad, street railway in Gadsden, Alabama

Union Railway (Missouri), street railway in Saint Joseph

Delaware River and Union Railroad, Marcus Hook, Pennsylvania, owned by Sun Oil

Union Freight Railroad, freight railroad on streets in Boston

Union Railroad (Pittsburgh, Pennsylvania), still in operation

Union Railroad (Massachusetts freight railway), part of the Boston and Albany Railroad system

Union Railroad (Brooklyn), street railway in New York City

Fremont, Lima and Union Railway, Fremont, Ohio to Rushville, Indiana via Union City, Indiana

Peoria and Pekin Union Railway, Pekin to Peoria

The following railroads have been named Union Railroad or Union Railway, usually because they connected or merged several other railroads. See joint railway for the concept of a railroad owned by more than one company.

American Railway Union

Galena and Chicago Union Railroad, Chicago to Clinton, Iowa

International Union of Railways

Union Station

Binghamton, Lestershire and Union Railroad, a street railway between Binghamton, New York and Union, New York, now a part of Endicott, New York.

Kentucky Union Railway, Lexington to Jackson, Kentucky

Montana Union Railway, Butte to Garrison, Montana

Northwestern Union Railroad, Milwaukee to Fond du Lac, Wisconsin

State Line and Union Railroad, Genoa, Illinois to Columbus, Wisconsin