Oxfordshire (abbreviated Oxon, from the Latinised form Oxonia) is a county in south-east England, bordering on Northamptonshire, Buckinghamshire, Berkshire, Wiltshire, Gloucestershire, and Warwickshire.

It is divided into five local government districts: Oxford, Cherwell, Vale of the White Horse (after the Uffington White Horse), West Oxfordshire and South Oxfordshire.

The county has a major tourism industry. The area is noted for the concentration of performance motorsport companies and facilities. Oxford University Press has headed a concentration of print and publishing firms; the university is also linked to the concentration of local biotechnology companies.

The main centre of population is the city of Oxford. Other significant settlements are Bicester, Banbury, and Chipping Norton to the north of Oxford; Witney to the west; Thame and Chinnor to the east; and Abingdon, Wantage, Didcot and Henley-on-Thames to the south. Future population growth in the county is hoped to be concentrated around Banbury, Bicester, Didcot and Witney, near the South Midlands growth area.

The highest point of the county is Whitehorse Hill, in the Vale of White Horse, reaching 856 feet (261m).

Oxfordshire's county flower is the Snake's-head Fritillary.

Abingdon, Adderbury, Alkerton, Ambrosden, Ardington, Asthall, Aston Rowant, Aynho, Bampton, Banbury, Barford St Michael, Barnard Gate, Beckley, Benson, Bicester, Black Bourton, Bledington, Bletchingdon, Blewbury, Bloxham, Brightwell Baldwin, Brize Norton, Broadwell, Buckland, Buckland Marsh, Burcot, Burford, Carterton, Chadlington, Chalgrove, Charlbury, Charney Bassett, Checkendon, Chesterton, Chinnor, Chipping Norton, Chipping Warden, Chislehampton, Christmas Common, Church Enstone, Church Hanborough, Clifton, Clifton Hampden, Cotswolds, Cropredy, Cuddesdon, Culham, Cumnor, Deddington, Denchworth, Didcot, Dorchester-on-Thames, Drayton St Leonard, Ducklington, Duns Tew, East Hanney, East Hendred, Edgehill, Enstone, Faringdon, Fifield, Filkins, Finmere, Finstock, Frilford, Fringford, Fritwell, Fyfield, Garsington, Goring, Goring upon Thames, Great Bourton, Greatworth, Harwell, Headington, Henley, Henley on Thames, Hook Norton, Horton-Cum-Studley, Kelmscot, Kidlington, Kingham, Kings Sutton, Kingston Blount, Kingston Lisle, Kirtlington, Launton, Lewknor, Little Coxwell, Littlemore, Longcot, Longworth, Lower Heyford, Lower Shiplake, Lower Wolvercote, Mapledurham, Marsh Gibbon, Marston, Middle Barton, Middleton Cheney, Milton Common, Minster Lovell, Murcott, North Moreton, Nuffield, Oxford, Ramsden, Roke, Rotherfield Peppard, Shenington, Shilton, Shipton-under-Wychwood, Shrivenham, Shutford, Souldern, South Moreton, South Stoke, Sparsholt, Stadhampton, Standlake, Stanford in the Vale, Stanton Harcourt, Stanton St John, Steeple Aston, Steventon, Stoke Row, Stow-on-the-Wold, Stratton Audley, Sutton Courtenay, Swalcliffe, Swerford, Swinbrook, Tadmarton, Tetsworth, Thame, The Barringtons, Thrupp, Tiddington, Uffington, Wallingford, Walton Manor, Wantage, Waterstock, Watlington, West Hanney, West Hendred, Westcott Barton, Weston on the Green, Wheatley, Witney, Woodstock, Woolstone, Wootton, Wytham

• Blenheim Palace
• Chinnor & Princes Risborough Railway -- A heritage railway
• Didcot Railway Centre -- Museum of the Great Western Railway
• Kelmscott Manor -- Home of William Morris
• Oxford
• River Thames
• Rousham House and Gardens