Stillingfleet is a village and civil parish in North Yorkshire, England. It was in the historic East Riding of Yorkshire, but since 1974 has come under North Yorkshire. It is about 6 miles (10 km) south of York and nearby settlements include Acaster Selby, Naburn and Appleton Roebuck.

Stillingfleet was once the site of UK Coal's Stillingfleet Mine, part of the Selby Coalfield, which closed in 2004.

St Helen's Church, the parish church, is a grade I listed building. Another notable building is Moreby Hall, which is grade II* listed.

The village was historically in the East Riding of Yorkshire, but from 1974 to 2023 was in the Selby District of the shire county of North Yorkshire. In 2023 the district was abolished and North Yorkshire became a unitary authority.

The origin of the name 'Stillingfleet' lies in Old English. The name means 'stretch of river belonging to the family or followers of a man called Styfel', and is composed of the elements Styfel (the name of the landowner), inga (followers of) and fleot (stream, inlet or creek). The village was recorded as Steflingefled in the Domesday Book of 1086.

On Boxing Day 1833, 11 members of a party of carol singers from Stillingfleet were drowned when their boat overturned in the nearby River Ouse.

• Historic England. "St Helen's Church (1296904)". National Heritage List for England.
• The ancient parish of Stillingfleet: historical and genealogical information at GENUKI.