In den Vijfhoek is een straat te Oldenzaal in de gemeente Oldenzaal en is gelegen in de Nederlandse provincie Overijssel.
| Postcode | Huisnummers |
|---|---|
| 7571 DT | 1, 5, 9, 13, 15, 17, 19, 21, 25, 29, 33, 35, 39, 43, 45; |
| 7571 DX | 2, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50; |
| 7571 DR | 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136; |
| 7571 DZ | 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 84, 86, 90, 92, 94; |
| 7571 DV | 49, 53, 57, 61, 65, 69; |
| 7571 DS | 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184; |
| 7571 DW | 105, 111, 113, 117, 121, 125, 137, 141, 155; |