Watchfield is a village and civil parish in the Vale of White Horse in on the edge of southwest Oxfordshire, southern England, about 3 miles (4.8 km) southeast of Highworth in neighbouring Wiltshire.

Watchfield consists partly of military accommodation for the Joint Services Command and Staff College (JSCSC) and the Conflict Studies Research Centre (CSRC) in the parish, as well as for the Defence Academy of the United Kingdom and Cranfield University across the boundary in Shrivenham.

Local amenities include the Eagle and College Farm public houses, a Midcounties Co-operative convenience store, a unisex hairdresser, optician, a McDonald's, a Subway, and Shrivenham Hundred Business Park which is host to a large number of businesses from small manufacturers to high end technology companies.

[7] On 23–31 August 1975, a former military site at Watchfield became the location of the People's Free Festival which had been held during the previous three years, despite opposition, in Windsor Great Park.

This new site was offered as an alternative venue due to government embarrassment at previous police actions and was attended by several thousand people.