Gentiaan is een straat te Harfsen in de gemeente Lochem en is gelegen in de Nederlandse provincie Gelderland.
| Postcode | Huisnummers |
|---|---|
| 7217 TW | 8, 10, 12, 14, 16, 18, 20, 22, 24t, 6, 4, 2, 24, 26t, 26; |
| 7217 TV | 41, 39, 37, 35, 33, 31, 29, 27, 25, 23, 21, 19, 17, 15, 13, 11, 9, 7, 5, 3, 1; |