Aldingbourne is a village, Anglican parish and civil parish in the Arun District of West Sussex, England. Its centre is 4 miles (6.4 km) north of Bognor Regis and 4 miles (6.4 km) east of Chichester with the A29 and A27 main roads running through it.

Arun is a local government district in West Sussex, England. Its council is based in Littlehampton. The district's other towns are Arundel and Bognor Regis. The district is named after the River Arun, which runs through the centre of the district. Parts of the district fall within the South Downs National Park.