The National Railroad Museum is a railroad museum located in Ashwaubenon, Wisconsin, United States.

Founded in 1956 by community volunteers, the National Railroad Museum is one of the oldest and largest U.S. institutions dedicated to preserving and interpreting the nation's railroad history. Two years later, a joint resolution of Congress recognized the museum as the National Railroad Museum. The museum has been a nonprofit 501(c)(3) organization since 1958.

Its collection of locomotives and rolling stock spans more than a century. Notable items include an Aerotrain; Union Pacific Big Boy No. 4017, one of the world's largest steam locomotives; and British Railways Class A4 No. 60008 Dwight D Eisenhower (ex-London & North Eastern Railway No. 4496 Golden Shuttle) and train used by the Supreme Allied Commander and his staff in the United Kingdom and continental Europe during World War II.

The Frederick J. Lenfesty Center, an enclosed and climate-controlled structure, built in 2001, houses several of the unique and rarer locomotives and cars. A museum building houses railroad artifacts, an archive, and photography gallery. A standard gauge track rings the grounds. An wooden observation tower has views of the Fox River and Green Bay.

The museum hosted an annual Day Out with Thomas event until 2019, in which Thomas the Tank Engine pulled young friends past the exhibited rolling stock. In October, it hosts "Terror on the Fox", the Green Bay Preble Optimist Club's haunted attraction that includes "haunted" train rides after dark.

Expansion A $17 million project expanded the indoor display area and added a plaza along the river. Opened on September 20, 2025, it used $7 million in American Rescue Plan Act funds contributed by the state of Wisconsin.

Rolling stock Steam Locomotives +Locomotive details Railroad Class Road number Notes ImageAtchison, Topeka and Santa Fe Railway5011 class ()5017Built by Baldwin in July 1944, 5017 is the museum's second largest locomotive, after the Big Boy, and is the only oil-burning steam locomotive in the museum's collection. 5017 was donated December 27, 1959 by the Santa Fe Railroad President, Ernest S. Marsh. It is currently sitting in the Victor McCormick Train Pavilion.Chesapeake and Ohio RailwayK-4 class 2–8–42736Built in 1944 by Alco, 2736 is one of 12 preserved C&O K-4s. 2736 was donated July 7, 1961 by the C&O. It is currently sitting in the Victor McCormick Train Pavilion.Lake Superior and Ishpeming RailroadSC-4 Consolidation24Built in 1910 by Alco, 24 is the oldest locomotive in the museum's collection and one of the few steam locomotives to have operated there. No. 24 was donated in May 1962 by the LS&I and pulled train rides for the museum until October 1972 when its side rods were found to be worn out. It is currently sitting in the Victor McCormick Train Pavilion.British RailA4 60008 Dwight D. EisenhowerBuilt in 1937 at Doncaster Works, 60008 is the only British passenger locomotive in the United States, and one of two A4s displayed in North America; the other being 4489 Dominion of Canada. In 2012, it was temporarily shipped back to England for restoration and to be displayed alongside the other five A4s in an event known as "The Great Gathering". It returned to Green Bay in 2014. Eisenhower was donated April 27, 1964 by British Railways and arrived the following month. It is currently preserved in the climate controlled Frederick J. Lenfesty Center.Duluth, Missabe and Iron Range RailwayE-1 class 2–10–2506Built in 1917 by Alco, 506 is the first of ten E1 Class locomotives built for the Duluth Missabe & Northern. No. 506 was in service with the DM&IR until 1962 and was donated to the museum the same year. It is the only preserved member of its class. The 506 was donated in May 1962 by the DM&IRR. It is currently sitting in the Victor McCormick Train Pavilion.Ely-Thomas Lumber Co. Shay5Built by Lima in 1917, 5 is the only narrow gauge locomotive at the museum, running on 3 ft gauge track. The 5 was donated by Mr. George Bantha Jr. in July 1972. It is currently sitting largely dissassembled on a flatcar in the Victor McCormick Train Pavilion.Pullman Company0-4-0ST29Built by Alco in 1923, 29 (previously known as the Brillion Pioneer) is one of the few steam locomotives to have operated at the museum. It pulled trains until it was banned by the City of Green Bay due to a chromium-lined chimney, which created toxic fumes. The 29 was donated in August 1961 by Mr. and Mrs. Harold Fuller. It is currently preserved in the climate controlled Frederick J. Lenfesty Center.Minneapolis, St. Paul and Sault Ste. Marie Railroad (Soo Line)H-23 class ()2718Built by Alco in May 1924, 2718 was the first piece to ever arrive at the museum. While technically obtained after the 261, it arrived earlier in the day than the 261. For the first few years of its time at the museum, the 2718 pulled excursion trains on the Soo Line's mainline with sister locomotive 2719. It was formerly retired in the early 60s. The 2718 was donated by the Soo Line on March 10, 1958, and arrived at the museum later that year. It is currently sitting in the Victor McCormick Train Pavilion.Sumter & Choctaw Railway102Built in June 1924 by Baldwin, 102 is the only steam locomotive that still traverses the museum's working loop. While it arrived at the museum with a cracked boiler and has never steamed there, in 1988 the Green Bay and Western Railroad's Norwood shops built a faux tender for it using parts for a GE 45 ton diesel switcher. It is normally used for special events as the tender is underpowered and prone to overheating. The 102 was donated June 5, 1962 by the Marathon Paper Division of the American Can Co. It is currently sitting in the Victor McCormick Train Pavilion and its original tender sits outside, behind the building.United States Army10-36E 101Built by Baldwin sometime between 1916 and 1918, the 101 is the last example of its class in preservation. After serving the United States Army in country during the first and second world wars, the 101 was shipped to Korea in 1951 to fight in the Korean War. While in Korea, it became property of the Republic of Korea and during this time its cab was blown up. It was discovered by Col. George Simpson (who later became museum director) and reconstructed by Army Transportation troops. The 101 was donated in 1958 by President Sygman Rhee of the Republic of Korea. It is currently preserved in the climate controlled Frederick J. Lenfesty Center.Union Pacific Railroad4000 class "Big Boy" 4-8-8-44017 Built by Alco in December 1944, Big Boy 4017 is one of the eight remaining Big Boy type locomotives. An impromptu attempt to bring the locomotive to steam in 1970 was reportedly attempted by visiting rail crew from the Flying Scotsman, but was aborted after 20 tons of coal failed to heat the boiler enough to produce steam. The 4017 is the only Big Boy with a tender (from Big Boy 4023) from the 1944 order of Big Boys, whose tenders held a larger fuel capacity. The 4017 was donated in July 1961 by Chairman of the Union Pacific Railroad, E. Rolland Harriman (for whom 4017 was once named).

Diesel locomotives +Locomotive details Railroad Model Road number Notes ImageWisconsin Central Ltd. (Ex - Fox River Valley Railroad)EMD SD24 2402 (CBQ 510)Ex-CBQ, previously restored back to its Fox River Valley Railroad appearance.Chicago, Milwaukee, St. Paul and Pacific Railroad (Milwaukee Road)FM H-10-44767Georgia Pacific RailwayAlco S-2 73 (Ex - 63–146)EX-SBRR, Currently painted in Great Northern Orange and Green numbered 11 though it was never operated by GNChicago, Rock Island and Pacific RailroadGeneral Motors Aerotrain Trainset 2 Comes with the main engine and two cars. One of only two surviving trainsetsGreen Bay and Western RailroadAlco C430315Manistique and Lake Superior Railroad (Later Ann Arbor Railroad) Alco S-3 10Minneapolis and St. Louis RailwayEMD NW1D538Wisconsin Central Ltd.EMD GP30 715Ex-SOOSouthern Pacific Transportation CompanyALCO S-61201 (Currently painted as GBW 106)Operational, mainly used for excursion runs around the museum propertyUnited States ArmyWhitcombe 44-ton switcher106United States ArmyALCO RSD-18651 Canadian National RailwayEMD E9103Donated by Canadian National Railway 2/2024 Wisconsin Central Ltd.EMD SW15001563Donated by Canadian National Railway on 11/13/2019

Electric locomotives +Locomotive details Railroad Class Road number Notes ImagePennsylvania RailroadGG14890PRR GG1 4890 at NRM, Green Bay, Wi in 2004.

Passenger cars +Passenger cars details Railroad Type Road number Notes ImageAtlantic Coast Line RailroadDining carDothanChicago and North Western Transportation CompanyBi-Level passenger car32Chicago and North Western Transportation CompanyCombination Baggage/Passenger car7411Chicago and North Western Transportation CompanyHospital Service Car"Joseph Lister"Chicago, Burlington and Quincy RailroadObservation car300 "Silver Spirit"This observation car once served the Burlington Route, and has been recently restored. It is only used for certain events and is displayed outdoors.Chicago, Burlington and Quincy RailroadSeven duplex bedroom, four section, three double bedroom, one compartment sleeping car1269 "Poplar River" (ex GN - same name and number)This train car was used on the Empire Builder.Chicago, Burlington and Quincy RailroadRailway post office car2330Chicago, Burlington and Quincy RailroadRailway Express Agency car1580Green Bay and Western RailroadCombination Mail/Baggage/Express car21 (ex passenger coach 52)Lake Superior and Ishpeming RailroadPassenger car62Lake Superior and Ishpeming RailroadCombination Baggage/Passenger car63London and North Eastern RailwayLNER Teak Sleeper Dwight D. Eisenhower1591From Dwight D. Eisenhower's command train, and is coupled behind the locomotive.London and North Eastern RailwayLNER Teak Sleeper Dwight D. Eisenhower1592From Dwight D. Eisenhower's command train, and is coupled behind the locomotive (currently coated in armor plating)Pullman CompanySleeping carPullman 8667 "Lake Mitchell"Reading CompanyXUsed as part of Terror on the Fox, a train ride during Halloween time.Reading CompanyYUsed as part of Terror on the Fox.Reading CompanyYCurrently painted as NRM "Josephine".Tennessee Central RailwayBusiness car(Monon) 100Union Pacific RailroadAstra Dome diner8003Used on the City of Los Angeles (currently undergoing restoration in museum shops)

Freight cars +Freight cars details Railroad Type Road number Notes ImageAkron, Canton and Youngstown RailroadOutside braced boxcar3011American CyanamidCovered hopper 134Armour and CompanyRefrigerator car4408Atchison, Topeka and Santa Fe RailwayFlatcar 206983Union Refrigerated Transit CompanyRefrigerator car72733leased to Black Hills Packing CompanyIllinois Central Gulf RailroadFlatcar 910302Menasha Wooden Ware CompanyBoxcar242This car is a replicaMinneapolis, St. Paul and Sault Ste. Marie RailroadOre hopper car80374Swift Refrigerator LineWooden refrigerator car5156Standard OilSingle-dome tank car9758North American Car CompanyDouble door boxcar50143North American Car CompanyCovered hopper30133PLM RailwayForty-and-eights boxcarFrom Merci TrainRichter Vinegar CompanyVinegar tank car20TTX CompanyTOFC-service flatcar970837Canadian NationalBoxcar414266Donated to museum by Canadian National Railway

Maintenance of way cars Railroad Type Road numberBurlington Northern RailroadJordan spreader973127Chicago, Burlington and Quincy RailroadDynamometer car30Escanaba and Lake Superior RailroadFlange plow100Wisconsin Central Railway, subsidiary of the Minneapolis, St. Paul and Sault Ste. Marie RailroadWrecking craneW-1Minneapolis, St. Paul and Sault Ste. Marie RailroadWrecking crane idler carX-

Cabooses