| 1 | W&DB | Wildwood and Delaware Bay Short Line R.R. Co. | 7/1923-7/1932 | | NAKINA |
| 2 | W&DB | WILDWOOD & DELAWARE BAY SHORT LINE RAILROAD CO. | | | PWRC |
| 3 | W&LE | The Wheeling & Lake Erie Ry. Co. | 8/1920-7/1936 | | NAKINA |
| 4 | W&LE | WHEELING & LAKE ERIE RWY. CO. | | | PWRC |
| 5 | W&N | Wisconsin & Northern R.R. Co. | 8/1920 | | NAKINA |
| 6 | W&N | Wisconsin & Northern R.R. Co. (Minneapolis, St. Paul & Saulte Ste. Marie Ry.) | 7/1923 | | NAKINA |
| 7 | W&N | MINNEAPOLIS, ST. PAUL & SAULTE STE. MARIE RWY. [WISCONSIN & NORTHERN RAILROAD CO.] | | | PWRC |
| 8 | W&NB | Williamsport & North Branch R.R. Co. | 8/1920 | | NAKINA |
| 9 | W&NB | Williamsport & North Branch Ry. Co. | 7/1930-4/1938 | | NAKINA |
| 10 | W&NB | Williamsport & North Branch Ry. Co. | Apr-38 | | NRHS |
| 11 | W&NB | WILLIAMSPORT & NORTH BRANCH RWY. CO. | | | PWRC |
| 12 | W&NO | Wharton & Northern R.R. (Co.) | 7/1923-4/1970 | | NAKINA |
| 13 | W&NO | Wharton & Northern R.R. | 4/38-4/70 | | NRHS |
| 14 | W&NO | WHARTON & NORTHERN RAILROAD CO. | | | PWRC |
| 15 | W&NR | Williamsport & North Branch Ry. Co. | 7/1923 | | NAKINA |
| 16 | W&NR | WILLIAMSPORT & NORTH BRANCH RWY. CO. | | | PWRC |
| 17 | W&OV | Warren & Ouachita Valley Ry. | 7/1923-4/1970 | | NAKINA |
| 18 | W&OV | Warren & Ouachita Valley Ry. | 4/38-4/70 | | NRHS |
| 19 | W&OV | WARREN & OUACHITA VALLEY RWY. CO. | | | PWRC |
| 20 | W&TR | Wrightsville and Tennille R.R. Co. | 7/1930-7/1936 | | NAKINA |
| 21 | W&TR | WEST TEXAS AND LUBBOCK RAILROAD CO. | | | PWRC |
