Wansdyke was a county constituency represented in the House of Commons of the Parliament of the United Kingdom.

1983–1997: The District of Wansdyke wards of Bathampton, Batheaston, Bathford, Camerton, Charlcombe, Freshford, Hinton Charterhouse, Keynsham East, Keynsham North, Keynsham South, Keynsham West, Midsomer Norton North, Midsomer Norton Redfield, Newton St Loe, Peasedown St John, Radstock, Saltford, and Westfield, and the District of Kingswood wards of Badminton, Bitton North Common, Bitton Oldland Common, Bitton South, Blackhorse, Bromley Heath, Hanham Abbots East, Hanham Abbots West, Oldland Cadbury Heath, Oldland Longwell Green, Siston, and Springfield.

1997–2010: The District of Wansdyke wards of Cameley, Camerton, Chew Magna, Chew Stoke, Clutton, Compton Dando, Farmborough, Harptrees, High Littleton, Hinton Charterhouse, Keynsham East, Keynsham North, Keynsham South, Keynsham West, Midsomer Norton North, Midsomer Norton Redfield, Newton St Loe, Paulton, Peasedown St John, Publow, Radstock, Saltford, Stowey Sutton, Timsbury, and Westfield, and the Borough of Kingswood wards of Bitton North Common, Bitton Oldland Common, Bitton South, Hanham Abbots East, and Hanham Abbots West.

It also covered parts of South Gloucestershire to the east of Bristol, including Bitton, Longwell Green and Oldland Common.

At the 2010 general election the seat was replaced with a new North East Somerset constituency.