As of December 31, 1950, the following quantities of flat cars were rostered in North America, according to the Official Railway Equipment Register (ORER). These "Top 16" owners represented more than 75 percent of the total.
| Railroad | Flat Cars | Models1 | |
| SP, T&NO | 8,439 | ||
| MILW | 5,296 | ||
| NP | 4,779 | Red Caboose (via InterMountain) | |
| SOU | 4,133 | ||
| C&NW | 3,560 | ||
| PRR | 3,381 | Bowser | |
| ACL | 2,861 | ||
| SAL | 2,789 | ||
| UP | 2,726 | Red Caboose (via InterMountain) Walthers |
|
| GN | 2,576 | Red Caboose (via InterMountain) | |
| ATSF | 2,332 | InterMountain Red Caboose (via InterMountain) |
|
| NYC | 1,901 | Red Caboose (via InterMountain) | |
| D&RGW | 1,705 | Red Caboose (via InterMountain) | |
| RI | 1,658 | Walthers | |
| L&N | 1,653 | ||
| CB&Q | 1,642 | ||
| 1Does not reflect "Craftsman" level models, which are available for almost any road. Such models are offered by Funaro & Camerlengo, Westerfield Models, and Sunshine. |
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