The region after the club's name indicates the region or regions from which the club draws members.
Alto Model Train Museum Association (Pennsylvania)
American Flyer S Gaugers of St. Louis (Missouri)
American Flyer S-Gauge Modular Club (California)
Arizona S Gaugers (Arizona)
Atlanta Area (Georgia)
Atlantic Coast S Gaugers Carolinas Division (North Carolina & South Carolina)
Atlantic Coast S Gaugers Elizabeth City Division (North Carolina)
Atlantic Coast S Gaugers Florida East Coast Division (Florida)
Atlantic Coast S Gaugers Georgia Division (Georgia)
Atlantic Coast S Gaugers Northern Florida Division (Florida)
Atlantic Coast S Gaugers Shenandoah Modular Division (Virginia)
Atlantic Coast S Gaugers Tidewater Division (Virginia)
Atlantic Coast S Gaugers Virginia Central Division (Virginia)
Atlantic Coast S Gaugers Washington & Old Dominion Division (Virginia)
Badgerland S Gaugers (Wisconsin)
Baltimore Area American Flyer Club (Maryland)
Bay Area S Scalers (California)
Black Diamond Society of Model Engineers (Pennsylvania)
Blue Ridge Scalers (Tennessee & North Carolina)
Bristol S Gauge Railroaders (Massachusetts & New Hampshire & Rhode Island & Connecticut)
Central Florida S Fellowship (Florida)
Central New York S Gauge Assn (New York)
Central Ohio Model Railroad Club (Ohio)
Central Ohio S Gaugers (Ohio)
Central Oklahoma S Gaugers (Oklahoma)
Chicagoland Association of S Gaugers (Illinois)
Connecticut S Gaugers (Connecticut)
Crescent City S-Gaugers (Louisiana)
Cuyahoga Valley S Gauge Assn (Ohio)
Delaware SeaSide Railroad Club (Delaware)
Delaware Valley S Gaugers (Pennsylvania)
Des Plaines Valley S Scalers (Illinois)
Ford's Colony Model Railroad Club (Virginia)
Freundeskreis Stadtilmer Bahnen (Germany)
Gadsden Pacific Division Toy Train Operating Museum (Arizona)
Golden Gate American Flyer Club (California)
Golden Spike American Flyer Club (Utah)
Hawkeye S Gaugers (Iowa)
Houston S Gaugers (Texas)
Houston Tinplate Operators Society (Texas)
Indiana S Scalers (Indiana)
Kansas City S Gaugers (Missouri)
Kansas City S Railers (Kansas)
Kansas City S Scalers (Missouri)
Lehigh Valley S Gaugers (Pennsylvania)
Lone Star Flyer Club (Texas)
Maine S Gaugers (Maine)
Masonic Village and Elizabethtown Model Railroad Club (Pennsylvania)
Miami Valley S Gaugers (Ohio)
Mid-Ohio Valley Model Railroad Club (West Virginia)
Nauset Model Railroad Club (Massachusetts)
Neshaminy Valley AF Club (Pennsylvania)
North Penn S Gaugers (Pennsylvania)
North Texas Narrow Gauge Group (Texas)
Northern Ohio S Scalers (Ohio)
Piedmont S Gaugers (North Carolina & South Carolina & Tennessee)
Pines & Prairies S Scale Workshop (Minnesota)
Pioneer Valley Model Railroad Club (Massachusetts & Connecticut)
Pittsburgh S-Gaugers (Pennsylvania & West Virginia)
Potomac Valley S Gaugers (Maryland)
Rocky Mountain Hi-Railers (Idaho)
S Gauge Wisconsin, Inc (Wisconsin)
S Scale Model Railway Society (Hertfordshire, England)
Sacramento Valley American Flyer Club (California)
San Diego S Gaugers (California)
Slim Gauge Guild (California)
Sn2 Crew (Pennsylvania & Maine & Maryland & Ohio)
South Jersey S Gaugers (New Jersey)
Southeastern Michigan S Gaugers (Michigan)
Southern California S Gaugers (California)
Southwestern Ohio S Scalers (Ohio)
Spokane, Panhandle, and Palouse Model Railroaders (Washington & Idaho)
State-Line S Gaugers (Illinois)
Suncoast American Flyer Enthusiasts (Florida)
Susquehanna S Gaugers (Pennsylvania)
Tauranga Model Railway Club Inc (New Zealand)
Texas Express S Scale (Texas)
The S Scale Workshop (Ontario, Canada)
The Villages Model Railroad Club (Florida)
Trinity River Express S-Scalers (Texas)
Upstate Model Railroaders (New York)
West Michigan S Gaugers (Michigan)
West Plains Model Railroad Club (Missouri)
Western NY S Scale Association (New York)
Wichita Toy Train Museum & Club (Kansas)