| Railroad | Records | Links |
|---|
| Totals | 33,505 | 998 |
|---|
| Hackensack and New York Railroad | 11 | |
| Halifax and Yarmouth Railway | 6 | |
| Hampton and Branchvllle Railroad | 6 | |
| Hampton and St Martins Railway | 4 | |
| Hannibal and St Joseph Railroad | 102 | 5 |
| Hanover Branch Railroad | 13 | |
| Harbor Springs Railway | 2 | |
| Hardwick and Woodbury Railroad | 7 | |
| Harriman and Northeastern Railroad | 10 | |
| Harriman Coal and Iron Railroad | 7 | |
| Harrisburg, Portsmouth, Mount Joy and Lancaster Railroad | 19 | 2 |
| Hartford and New Haven Railroad | 46 | 2 |
| Hartford, Providence and Fishkill Railroad | 44 | 3 |
| Hawkinsville and Florida Southern Railway | 8 | |
| Hawthorne, Nebaganion and Superior Railway | 8 | |
| Hazelhurst and Southeastern Railway | 6 | |
| Hazleton Railroad | 14 | |
| Hearne and Brazos Valley Railroad | 4 | |
| Hecla and Torch Lake Railroad | 6 | |
| Hempfield Railroad | 19 | |
| Hetch-Hetchy and Yostmite Valley Railroad | 3 | |
| Hickman and Obion Railroad | 14 | |
| Hickory Valley Railroad | 6 | |
| Hocking Valley Railway | 16 | |
| Hoffman and Troy Railroad | 5 | |
| Hollins, Helflin and Sylacauga Railroad | 5 | |
| Holly River and Addison Railway | 7 | |
| Holston Valley Railway | 5 | |
| Hoosac Tunnel and Wilmington Railroad | 13 | |
| Housatonic Railroad | 40 | 1 |
| Houston and Texas Central Railroad | 141 | 1 |
| Houston East and West Text Railway | 9 | |
| Hudson and Boston Railroad | 15 | 1 |
| Hudson River Railroad | 57 | 3 |
| Hunters Run and Slate Belt Railroad | 6 | |
| Huntingdon and Broad Top Mountain Railroad | 15 | 1 |
| Huntington and Broad Top Railroad | 24 | 1 |
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