Onyxhorst is een straat te 's-Gravenhage in de gemeente 's-Gravenhage en is gelegen in de Nederlandse provincie Zuid-Holland.
| Postcode | Huisnummers |
|---|---|
| 2592 HB | 4, 5, 6, 8, 10, 12, 14, 16, 18A, 18, 20, 22, 24, 26, 28, 30, 32, 34; |
| 2592 HC | 25, 27, 29, 31, 33, 35, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66; |