Oakhanger is a village in the East Hampshire district of Hampshire, England. Its nearest town is Bordon, which lies 1.7 miles (2.7 km) east, of the B3004 road. The village is part of the parish of Selborne, which covers an area of 7,915 acres (3,203 ha). The nearest railway station is Alton, which is 3.8 miles (6.1 km) northwest of the village, although Oakhanger formerly had its own military railway station, Oakhanger Halt railway station on the Longmoor Military Railway, until its closure.

The Longmoor Military Railway (LMR) was a British military railway in Hampshire that was built by the Royal Engineers from 1903 to train soldiers on railway construction and operations. The railway ceased operation on 31 October 1969.