- 3mm - The Three-Millimetre Society - Features its history, background to TT3 gauge, picture galleries and membership information.
- Chiltern Model Railway Association - Founded in 1965 the Association, through its membership, aims to encourage and promote the model railway hobby in the UK.
- FREMO Freundeskreis Europäischer Modellbahner eV - Modelrailroading on modules in several scales and from different prototypes. Information on implemention of DCC on really large layouts.
- Lionel Collectors Club of America (LCCA) - An international club of electric toy train lovers, operators and collectors. Publishes The Lion Roars (news), Interchange Track (Buy-Sell-Trade); train meets, conventions, swapping events for fans of all ages.
- Lionel Operating Train Society - A large collection of articles, reviews, individual pieces, and photos, all dedicated to Lionel Trains.
- N Gauge Society - Promotes N Gauge Model Railways, supports the hobby and provides a forum for all N Gauge enthusiasts.
- NTRAK Modular Railroading Society, Inc. - Provides specifications and information about NTRAK modules, the most popular model railroading module type. NTRAK is for N scale (1:160). Includes links to NTRAK local and regional clubs.
- Ridge Live Steamers - Dedicated to the preservation of our railroad heritage. Photo gallery, information on group, location and facility, event calendar and membership.
- The 'S' Scale Model Railway Society - 3/16" scale is somewhere between 4mm and Gauge 0, usually modelling to high standards. Provides choice of browser viewing modes on arrival.
- The 2mm Scale Association - Information about 2mm Scale (1:152), predominantly scratch building. Information about the Association and membership rates. Articles, photographic albums, and links to other specialist 2mm sites. Some support for 1:160 finescale (FiNe) and Nn3/Nm.
- Toy Train Operating Society - Dedicated to the operating and collecting of trains of all makes and eras. Includes information about activities, a membership application, a directory of divisions, a calendar of events, and publications. Located in Pasadena, California, USA.