't Westert is een straat te Oldemarkt in de gemeente Steenwijkerland en is gelegen in de Nederlandse provincie Overijssel.
| Postcode | Huisnummers |
|---|---|
| 8375 CJ | 24, 26, 28, 30, 32, 34, 36, 38, 40t, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 40; |
| 8375 CH | 25, 23, 21, 19, 17, 15, 13, 11, 9, 7, 5, 3, 1; |