Slinfold is a village and civil parish in the Horsham District of West Sussex, England.

The village is almost 4 miles (6.4 km) west of Horsham, just off the A29 road.

The parish covers 4,186 acres (1,694 ha). The 2001 Census recorded a population of 1,647 people living in 627 households of whom 780 were economically active.^{[citation needed]}

Slinfold is the source of the western River Adur, which flows to the English Channel at Shoreham-by-Sea

Alfodean was excavated by archaeological television programme Time Team in 2006, the site of one of a probable four mansiones on the route of Stane Street between London and Chichester.

There has been a house at Dedisham, 1 mile (1.6 km) northeast of the village, since at least 1271, when Henry III granted the then occupier a licence to crenellate the manor house then on the site. The present house on the site appears to date from the 16th or 17th century. During the English Civil War the Parliamentarian commander Sir William Waller sacked a house on this site in 1643.

Slinfold Manor, 1.5 miles (2.4 km) south of the village, is a Georgian house built late in the 18th century.

Slinfold railway station on the Cranleigh Line was opened in 1865 and closed in 1965. The trackbed of the line now forms part of the Downs Link Bridleway. The route of the former Roman road linking London and Chichester passes through the parish and a Roman posting station existed at Alfoldean. In 1848 it was recorded that Roman swords and brass ornaments had been found in the parish.