Chesterton is a village and civil parish on Gagle Brook, a tributary of the Langford Brook in north Oxfordshire. The village is about 1+1⁄2 miles (2.4 km) southwest of the market town of Bicester. The village has sometimes been called Great Chesterton to distinguish it from the hamlet of Little Chesterton, about 3⁄4 mile (1.2 km) to the south in the same parish. The 2011 Census recorded the parish population as 850.