| Class | Name | Website URL | Wikipedia URL | Comment |
|---|
| 1, 2 | Accurail | http://www.accurail.com/accurail/ | | |
| 1 | American Flyer | https://en.wikipedia.org/wiki/American_Flyer | | Now owned by Lionel Corporation |
| 3 | AMMO-MIG | https://www.migjimenez.com/en/?dontshowhmw=yes | https://en.wikipedia.org/wiki/Noch_(model_railroads) | |
| | AHM
Associated Hobby Manufacturers | | | Out of Business |
| 1 | AHM | | | AHM-Rivarossi-Modell Expo
Now Walthers |
| | ALCO Models | | | Out of Business |
| AMBROID | | | Out of Business |
| American Standard Car Copmany | | | Out of Business
Merged with Scalecitydesigns.com |
| 1, 2 | Athearn | http://www.athearn.com/ | | |
| 1, 2 | Atlas | https://shop.atlasrr.com/ | | |
| 1 | Bachmann | https://www.bachmanntrains.com/home-usa/ | | |
| Backwoods Miniatures | | | Out of Business |
| Beaver Creek Model Company | | | Out of Business |
| Branchline Trains | | | Merged laserartstructrues.com |
| 1, 2 | Bowser | | https://en.wikipedia.org/wiki/Bowser_Manufacturing | |
| 1 | Broadway limited Imports | https://www.broadway-limited.com/ | | |
| C & B T Shops | | | Out of Business |
| C.C. Crow | | | Merged Builders-in-Scale.com |
| Cal Scale | | | Merged Bower-trains.com |
| Champ Decal | | | Out of Business |
| 1 | CentralValley Model Works | http://www.cvmw.com/ | | |
| 5 | Details West | https://www.detailswest.com/ | | |
| 1 | E & C Shops | | | Acquired by LBF Company 1999 (LBF Out of Business |
| 1 | EEL River Models | | | Acquired by Rail Shop 2008 (out of business) |
| E&B Valley | | | See Con Cor |
| 2 | Fast Tracks Hobbyworks | https://www.handlaidtrack.com/ | | |
| 1 | Faller | https://www.faller.de/de/en/Home.html | | |
| 1 | Front Range | | | Acquired by LBF Company (LBF Out of Business |
| 5 | Grandt Line | | | Merger Sanjuandetails.com |
| 1 | Heljan | http://www.heljan.dk/shop/frontpage.html | | |
| 1 | Hornby America | https://us.hornby.com/ | https://en.wikipedia.org/wiki/Hornby_Railways | |
| 1 | IMWX | | | Out of Business |
| 1 | InterMountain Railway Co | https://www.intermountain-railway.com/ | | |
| 1, 2, 5 | K-Line | | https://en.wikipedia.org/wiki/K-Line | |
| 1, 2 | Kadee | https://www.kadee.com/ | | |
| 1 | Kato Precision Railroad Models | https://www.katousa.com/ | https://en.wikipedia.org/wiki/Kato_Precision_Railroad_Models | |
| Keystone | | | Out of Business |
| 1 | LGB | https://www.lgb.com/ | | |
| 1 | Life-Like | | https://en.wikipedia.org/wiki/Life-Like | |
| 1 | Lionel | | https://en.wikipedia.org/wiki/Lionel_Corporation | |
| 1 | Lionel LLC | | https://en.wikipedia.org/wiki/Lionel,_LLC | |
| 1 | Marklin | https://www.marklin.com/ | | |
| 1 | McKean Models | | | Acquired by LBF (LBF out of business) |
| 1 | Model Die Casting (MDC) | | | Merged into Athearn
Horizon Hobbies |
| 1, 2,
3, 4 | Micro Mark | https://www.micromark.com/ | | |
| 2 | Micro Engineering | http://microengineering.com/Micro_Engineering_Ordering_Information_v7.pdf | | |
| 1 | Micro-Trains Line Co | https://www.micro-trains.com/ | | |
| 1 | MTH Electric Trains | https://www.mthtrains.com/ | https://en.wikipedia.org/wiki/MTH_Electric_Trains | Acquired by Scale Trains 2021 |
| 1 | Mantua Trains | | | The final production year for Mantua was 2001. “Mantua Classics” continues today as part of the Model Power line, which is distributed by Model Rectifier Corp. (MRC). |
| Model Power | | | see above |
| 1, 2 | Model Rectifier Corp | https://www.modelrectifier.com | | |
| 6 | Monroe Models | http://www.monroemodels.us/ | | |
| 1, 2 | Noch | https://www.noch.com/ | https://en.wikipedia.org/wiki/Noch_(model_railroads) | |
| 1 | Red Caboose | https://www.intermountain-railway.com/ | | Now InterMountain-Railway |
| 2 | Peco | http://www.peco-uk.com/ | https://en.wikipedia.org/wiki/Peco | |
| Pecos River Brass | | | Out of Business |
| 1, 2 | Piko | | https://en.wikipedia.org/wiki/PIKO | |
| 1 | Rivarossi | | https://en.wikipedia.org/wiki/Rivarossi | |
| Robins Rails | | | See Con Cor |
| Roundhouse (MDC) Model Die Casting | | | Merger Athearn |
| Rusty Stumps Scale Models | | | Merger rail-scale-models.com |
| Pacific Fast Mail | | | Out of Business |
| 5 | Precision Scale Brass | https://www.precisionscaleco.com/ | | |
| 1 | Roco | | https://en.wikipedia.org/wiki/Roco | https://en.wikipedia.org/wiki/Roco |
| 1 | Scale Trains | https://www.scaletrains.com/ | | |
| Spectrum | | | Merger Bachmann Trains |
| Sunshine Models | | | Merger Resin Car Works
sunshinekits.com |
| 1 | Tangent | https://www.tangentscalemodels.com/ | | |
| 3, 4 | Tamiya | https://www.tamiyausa.com/shop/paints/ | | |
| 4 | The Small Shop | https://thesmallshop.com/ | | Photo Etch Bending Tools |
| 1 | Trix | | https://en.wikipedia.org/wiki/Trix_(company) | |
| 1 | Tyco | | https://en.wikipedia.org/wiki/Tyco_Toys | |
| 1 | USA Trains | http://www.usatrains.com/ | | |
| Weaver | | | Out of Business |
| Western Scale Models | | | Merger wildwestmodels.com |
| 1 | Wheels of Time | | | |
| 3 | Vallejo | https://acrylicosvallejo.com/en/ | | |
| 1 | Varney Scale Models | | https://en.wikipedia.org/wiki/Varney_Scale_Models | |
| 1, 2 | Vollmer | | https://en.wikipedia.org/wiki/Vollmer_(company) | |
| 1 | Westerfield Models LLC | http://www.westerfieldmodels.com/ | | Resin Kits |
| 1 | Williams Electric Trains | | https://en.wikipedia.org/wiki/Williams_Electric_Trains | |
| 1,2,3,4,5 | Wm K Walthers | https://www.walthers.com/ | https://en.wikipedia.org/wiki/Wm._K._Walthers | |
| 1,2 | Yarmouth Model Works | www.yarmouthmodelworks.com | | |
| Ye Olde Huff N Puff | | | Merger labellemodels.com |
