Arundel and South Downs (/ˈærʊndəl/) is a constituency[n 1] in West Sussex created in 1997 and represented in the House of Commons of the UK Parliament by Andrew Griffith, a Conservative, since 2019.

In June 2016, an estimated 50.3% of local adults voting in the EU membership referendum chose to remain in the European Union instead of to leave.

This was defied in two January 2018 votes in Parliament by its MP, in line with his governing party's promise to adhere to the overall result of that referendum.

The incumbent Howard Flight MP had national media coverage in the run-up to the 2005 general election due to his deselection requested by the party leader for membership of Conservative Way Forward, lobbying for spending cuts to be more severe than set out in the small cuts in the 2005 manifesto.

Anne Marie Morris, Laura Sandys and Nick Herbert put themselves forward for nomination as replacement candidates.