Hoofdstraat is een straat te Nieuwolda in de gemeente Oldambt en is gelegen in de Nederlandse provincie Groningen.
| Postcode | Huisnummers |
|---|---|
| 9944 AA | 25, 27, 23, 21, 19, 15, 11, 9, 7, 5, 3, 1; |
| 9944 AJ | 124, 122, 120, 120A, 118, 116, 114, 110, 108, 106, 104, 102, 100, 98; |
| 9944 AD | 101, 105, 107, 109, 111, 113, 115, 117, 119; |
| 9944 AG | 40, 42, 44A, 44, 46, 48A, 48, 58, 60, 32, 34, 36, 38; |
| 9944 AH | 62, 70, 74, 76, 80, 84, 86, 88, 90, 92A, 92, 94, 96; |
| 9944 AB | 29, 31, 35, 37, 41, 43, 45, 51, 53, 57, 59; |
| 9944 AE | 2, 4, 6, 10, 12, 16, 20, 22, 24, 26, 28, 30; |
| 9944 AC | 63, 65, 67A, 69, 73, 75, 77, 91, 93A, 93B, 95, 97, 99; |