| Big Bend Railroad Club |
Webster Groves, Missouri, USA |
| Boeing Employees' Railroad Club - St. Louis |
St. Louis, Missouri, USA |
| Central Missouri Chapter of the TCA |
Columbia, Missouri, USA |
| Gateway Chapter of the TCA |
St. Louis, Missouri, USA |
| Gateway Division |
IL & MO, USA |
| Greater Kansas City Model Railroad Club |
Kansas City, Missouri, USA |
| Heart of America Chapter of the TCA |
Kansas City, Missouri, USA |
| Heartland Toy Train Association |
AR, CO, KS, MO, OK, & TX, USA |
| Maple Leaf Area Division |
AR, KS, MO, & OK, USA |
| Mississippi Valley N Scalers |
St. Louis, Missouri, USA |
| NMRA Mid-Continent Region |
AR, IA, IN, KS, MO, NE, & OK, USA |
| Ozark Division of the TCA |
AR, KS, MO, & OK, USA |
| Ozark Mountain Area Division |
Missouri, USA |
| Ozarks Model Railroad Association |
Springfield, Missouri, USA |
| Turkey Creek Division |
KS & MO, USA |
