National Finescale Organisations
- British Railway Modellers of Australia
- British Railway Modellers of North America
- Broad Gauge Society
- DEMU
- Double O Gauge Association
- Fremo Modular Layouts (FREMO)
- HMRS
- MERG
- NMRA
- NMRA (British Region)
- P:87 Special Interest Group
- Proto 48 site
- Proto:64 SIG
- S Scale Society
- ScaleSeven Group
- The 2mm Scale Association
- The 3mm Society
- The CMRA
- The EM Gauge Society