Union Pacific O Gauge Model Trains

Union Pacific Railroad, one of the largest Class I railroads in the United States, operating across the western two-thirds of the country. Known for its Big Boy and Challenger steam locomotives and distinctive armor yellow paint scheme.

Union Pacific (UP) is one of the most popular road names in O gauge model railroading. Manufacturers like Lionel, MTH Electric Trains, Atlas, and Williams by Bachmann have produced hundreds of Union Pacific locomotives, freight cars, passenger cars, and train sets over the decades. Whether you are looking for a premium scale model with full sound and command control or an affordable starter piece, TrainFinder helps you compare prices across 15+ trusted sellers and eBay to find the best deal on Union Pacific rolling stock.

Prices on Union Pacific model trains vary significantly between sellers. The same locomotive or car can be $50 to $200 cheaper at one dealer compared to another. Use TrainFinder to search our catalog, filter by category and condition, and see every available listing side by side — so you never overpay for your next Union Pacific addition.