| Country: | England |
| Official Name: | Blacknest |
| Coordinates: | 51.1673°N -0.8598°W |
| Shire District: | East Hampshire |
| Shire County: | Hampshire |
| Region: | South East England |
| Post Town: | ALTON |
| Postcode Area: | GU |
| Postcode District: | GU34 |
| Dial Code: | 01420 |
| Os Grid Reference: | SU7981641511 |
Blacknest is a village in Hampshire, England. It is in the civil parish of Binsted.
The village has a golf course (the Blacknest Golf & Country Club), one pub (named the Jolly Farmer), and access to the Alice Holt Forest. Its nearest town is Alton, which lies approximately 5 miles (8 km) west from the village.