Fonteinstraat is een straat te Midlum in de gemeente Harlingen en is gelegen in de Nederlandse provincie Friesland.
| Postcode | Huisnummers |
|---|---|
| 8872 NJ | 24, 26, 28, 30, 32, 34, 22, 20, 18, 16, 10, 9, 8, 7, 6, 5, 3, 2, 1; |
| 8872 NH | 31, 29, 27, 25, 23, 21, 19, 17, 15, 13, 11; |