Mid Oxfordshire was a parliamentary constituency in Oxfordshire, returning one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom. Unusually, its official name - Mid-Oxon - incorporated an abbreviation (Oxon, for Oxonia) but the full form of the county name was and is normally used in referring to the constituency.

The constituency was created for the February 1974 general election from parts of the seats of Banbury and Henley, and abolished for the 1983 general election.

Throughout its existence, the seat was represented for the Conservatives by Douglas Hurd with comfortable majorities.

• The Urban District of Witney;
• The Rural District of Witney; and
• Parts of the Rural Districts of Bullingdon and Ploughley.

The constituency was formed largely from the constituency of Banbury, incorporating the Urban and Rural Districts of Witney and the parts of the Rural District of Ploughley in Banbury, including Kidlington.  It also included further parts of the Rural District of Ploughley (to the south of Bicester) and northernmost parts of the Rural District of Bullingdon (to the east of Oxford), transferred from Henley.

It was abolished in 1983, following the reform of local government districts which came into effect in 1974. The bulk of the constituency, including the areas constituting the former Urban and Rural Districts of Witney, together with the town of Kidlington, formed the new constituency of Witney. Eastern rural areas were transferred to Banbury and Henley, with the wards of Marston and Risinghurst being included in the new constituency of Oxford East.