 The civil parish, named after the small village of Aldingbourne, includes the much larger settlement of Westergate, as well as smaller settlements Norton, Nyton, Woodgate and Lidsey.The ecclesiastical parish extends to .The developed south and east of the parish is on fertile soil 7–15 metres above sea level, whereas north of the A27 road at the foot of the South Downs National Park the land reaches 37 metres in altitude.