The Anglican parish includes the neighbouring settlements of South Mundham, Runcton and Merston.

[4] The earliest known appearance of the name is se northra Mundan ham, which is listed as appurtenant in a charter from AD 680 by which Cædwalla of Wessex gave Pagham to Wilfrid.

[5] Mund is the nominative plural of the Old English word munda, meaning "protector" or "guardian.

"[6] The suffix -ham is the Old English noun meaning "homestead, village, manor or estate."

[3] The parish church, in the Diocese of Chichester, is dedicated to St Stephen and is a Grade II* listed building; it dates from the 13th century, but was largely (apart from the tower) restored in 1883 by Sir Arthur Blomfield.