New Haven Society of Model Engineers
- HO and O scale model railroading club in Wallingford.
- http://pages.cthome.net/wtfk/nhsme.html

Housatonic Model Railway Club
- Fairfield, CT. Club HO layout broadly follows what the Housatonic Railroad might have looked like in the 1950's, had it remained independent.
- http://www.housatonicmr.org/

Torrington Area Model Railroaders
- This club is a HO and N scale modular club in the Torrington, CT (Northwest) area. We are open for new members.
- http://pages.cthome.net/ctnw

Valley Ntrak of Connecticut
- Established in 1976, in the Oxford area. We hold informal organizational and construction meetings once a month at members' homes. Membership is open to all. Learn all about Nscale model railroading.
- http://www.vntrak.com