Bullingdon is an ancient hundred in the south-east of the county of Oxfordshire.
The hundred used to include villages such as Cuddesdon, Garsington, the Baldons and Milton. However, the hundred was changed by the nineteenth century to conform more regularly with council wards and today it covers the area of several ancient hundreds, occupying most of south-central Oxon.
The primary use of the hundred area today is for census data. Beyond this, the distinction bears little contemporary importance and is little-known popularly. However the name lives on in the form of Bullingdon Prison, a Category B/C prison located in the village of Arncott in Oxfordshire.