| Abbreviation | Designation | |
|---|---|---|
| SN | Southern | railway company |
| DE-SN | Sachsen, Freistaat Sachsen (German) Saxony | country code |
| SN | S-Bahn Nachtlinie (German) | train category |
| SN | Schwerin Hbf, Landeshauptstadt Schwerin (German) | fare point / vehicle registration plate |
| Sn | Stenkullen (Swedish) | station code |
| Sn | Stensjön (Swedish) | station code |