Lancing is a village and civil parish in the Adur district of West Sussex, England, on the western edge of the Adur Valley. It lies on the coastal plain between Sompting to the west, Shoreham-by-Sea to the east and the parish of Coombes to the north. It is sometimes credited as being the largest village in England, covering an area of 3.65 miles² (946.4 hectares).
It is a mix of coastal urban dwelling and rural chalk downland landscape. The oldest non-religious buildings date to around 1500 CE. The 2002 population was around 19,000.
The village was a popular seaside resort in the mid-19th century, gaining favour from the gentry of the time for its secluded atmosphere. Lancing today no longer has a notable tourist trade although there are a number of small guest houses, most of them on the A259 coast road.