| Railroad | Records | Links |
|---|
| Totals | 25,132 | 858 |
|---|
| Fairchild and Northeastern Railway | 5 | |
| Fairhaven Railroad | 7 | |
| Fall Brook Railway | 7 | |
| Farmville and Powhatan Railroad | 10 | |
| Fayette County Railroad | 8 | |
| Findlay, Fort Wayne and Western Railway | 16 | |
| Fitchburg and Worcester Railroad | 9 | |
| Fitchburg Railroad | 58 | 1 |
| Flemington Railroad | 14 | 5 |
| Flint and Pere Marquette Railroad | 19 | 1 |
| Florence and Cripple Creek Railway | 8 | |
| Florida and Georgia Railway | 3 | |
| Florida Central and Peninsular Railroad | 14 | |
| Florida Central and Western Railroad | 4 | |
| Florida East Coast Railway | 14 | |
| Florida Midland Railway | 5 | |
| Florida Railroad | 5 | |
| Florida Railroad Company | 5 | 2 |
| Florida Southern Railway | 4 | 1 |
| Florida Transit and Peninsular Railroad | 4 | |
| Florida Western Railroad | 2 | |
| Flovilla and Indian Springs Railway | 4 | |
| Flushing Railroad | 14 | |
| Fonda, Johnstown and Gloversville Railroad | 9 | |
| Fordyce and Princeton Railway | 7 | |
| Fort Smith and Western Railroad | 6 | |
| Fort Smith, Poteau and Western Railway | 4 | |
| Fort Wayne and Chicago Railroad | 13 | |
| Fort Wayne and Jackson Railroad | 6 | 1 |
| Fort Wayne and Southern Railroad | 16 | |
| Fort Wayne Cincinnati and Louisville Railroad | 10 | |
| Fort Worth and Denver City Railroad | 31 | 1 |
| Fort Worth and Rio Grande and Southern Railway | 8 | |
| Fort Worth and Rio Grande Railway | 6 | |
| Four Mile Valley Railroad | 9 | |
| Frankfort and Cincinnati Railway | 6 | |
| Franklin and Megantic Railway | 5 | |
| Fredericksburg and Gordonsville Railroad | 11 | |
| Freehold and Jamesburg Agricultural Railroad | 19 | 2 |
| Fremont and Indiana Railroad | 11 | |
| Fremont, Elkhorn and Missouri Valley Railway | 37 | |
| Fulton County Narrow Gauge Railway | 9 | |
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