Lyminster is a village in Lyminster and Crossbush civil parish, in the Arun District of West Sussex, England. It is just north of Littlehampton, about north of the town centre. The civil parish covers an area of and the 2011 Census recorded a parish population of 369 people.
The Church of England parish church of St Mary Magdalene is an 11th-century Saxon building and Grade I listed. The church has a ring of six bells. Lester and Pack of the Whitechapel Bell Foundry cast the treble, second and fourth bells in 1759. John Warner and Sons of Cripplegate, London cast the third and fifth bells in 1887, the year of the Golden Jubilee of Queen Victoria. Mears and Stainbank of the Whitechapel Bell Foundry cast the tenor bell in 1950. According to the Hagiography of the Secgan Manuscript the village is the burial place of Saint Cuthflæd of Lyminster.
Just to the north of the village is a knuckerhole which, according to legend, was once the home of a dragon, the Knucker. The church contains a tombstone called the Slayer's Slab, which is supposed to be from the tomb of the dragonslayer.
Lyminster has a public house, The Six Bells.