The River Fal flows through Cornwall, United Kingdom, rising on the Goss Moor (between St. Columb and St Austell) and reaching the English Channel at Falmouth. The River Fal separates the Roseland Peninsula from the rest of Cornwall. The Fal estuary is a classic ria, or drowned river valley, caused by rising sea levels. The main tributary of the Fal is the River Truro. The estuary of the River Fal is called Carrick Roads.
The origin and meaning of the name of the river are unknown. The earliest occurrences of the name are in documents of 969 and 1049 AD. Falmouth, a town which was known by another name until the 17th century, is named after the River Fal.
Tributaries of the River Fal include the River Truro, River Kennal, River Penryn and River Carnon. Several tidal creeks discharge into the River Fal including the Helford River, Mylor Creek, Pill Creek, Penpol Creek and Restronguet Creek.
The river is crossed by the historic and scenic King Harry Ferry, a vehicular chain ferry that links the villages of Feock and Philleigh.
- Ekwall, E. (1940) The Concise Dictionary of English Place-names; 2nd ed. Oxford: Clarendon Press; p. 165
- "Fal at Tregony". Natural Environment Research Council. Retrieved 2010-02-09.