| 1 | YARA | Yara Rostock Zweigniederlassung der Yara GmbH & Co. KG | | DE | VKM |
| 2 | YARAF | Yemen Arab Republic Air Force | | YE | TRAFFIC |
| 3 | YARAF | Yara Suomi Oy | | FI | VKM |
| 4 | YARB | YARBROUGH TRANSFER COMPANY | | | SCAC1 |
| 5 | YARB | YARBROUGH TRANSFER COMPANY | | | SCAC4 |
| 6 | YARE | YARZA RODRIGUEZ, MARIA EUGENIA | | | SCAC4 |
| 7 | YARL | YARMOUTH LUMBER INC | | | SCAC4 |
| 8 | YARR | Youngstown & Austintown R.R., Inc. | added 4/1985 | | NAKINA |
| 9 | YARR | Ohio R.R. System | eliminated 10/1992 | | NAKINA |
| 10 | YARR | Columbus & Ohio River R.R. Co., Inc. | added 10/1992 | | NAKINA |
| 11 | YARR | Youngstown & Austintown R.R., Inc. | 1/1994-7/2005 | | NAKINA |
| 12 | YARR | Youngstown & Austintown R.R., Inc. | added 4/85 | | NRHS |
| 13 | YARR | Ohio R.R. System | eliminated 10/92 | | NRHS |
| 14 | YARR | Columbus & Ohio River R.R. Co., Inc. | added 10/92 | | NRHS |
| 15 | YARR | Youngstown & Austintown R.R., Inc. | 1/94-7/2000 | | NRHS |
| 16 | YARR | YOUNGSTOWN & AUSTINTOWN RAILROAD, INC. | | | PWRC |
| 17 | YARR | Youngstown and Austintown Railroad | | | RSRV |
| 18 | YARS | YARASHIP AS | | | SCAC4 |
| 19 | YARU | Yamaruji Nostalgic Railway | | | TRAFFIC |
