Westerstraat is een straat te Ter Apel in de gemeente Vlagtwedde en is gelegen in de Nederlandse provincie Groningen.
| Postcode | Huisnummers |
|---|---|
| 9561 SM | 2, 4, 6, 7, 8a, 8, 9, 11, 12, 13, 14, 17, 18, 19, 20, 21, 22, 23, 25; |
| 9561 SN | 26, 27, 29, 30, 32, 33, 34, 35, 45, 46, 47, 49, 50; |
| 9561 SR | 51, 52, 54, 56 TRAF, 56, 59, 61, 63, 64, 65, 67, 68, 69, 71, 73, 74, 75, 76, 77, 78, 79; |
| 9561 ST | 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104; |
| 9561 SV | 105, 106, 107, 108, 109, 110, 111, 113, 114, 115, 116, 117, 118, 119, 120, 121, 123, 125, 128, 129, 130, 131, 133, 134; |
| 9561 SW | 135, 136, 139, 141, 142, 143, 144, 146 TRAF, 146, 147, 148, 149, 151, 152, 158, 159, 161a, 161, 162, 163, 167; |
| 9561 SX | 168, 170, 172, 175, 178, 193, 192, 191, 190, 189, 188, 186, 185, 184, 182, 179; |
| 9561 SZ | 209, 207, 205, 204, 204 TRAF, 201, 199, 198, 197, 194; |