The county of Cornwall, located in southwest England in the United Kingdom, contains numerous small rivers and streams. The border between Cornwall and the neighbouring county of Devon is mostly the River Tamar.

Name	Length	Source	Mouth	Photo
River Allen		St Allen	River Truro
River Allen		Camelford	River Camel
River Camel	74 km (46 mi)	Bodmin Moor (50°39′33″N 4°38′29″W)	Padstow Bay
River Caerhays	13 km (8.1 mi)[1]		English Channel (50°14′12″N 4°50′29″W)
Carnon River		Chacewater (50°15′45″N 5°9′30″W)	English Channel
River Cober		Nine Maidens Downs	The Loe
De Lank River	9 mi (14 km)	Bodmin Moor	River Camel
River Fal	29 km (18 mi)	Goss Moor	English Channel
River Fowey	40 km (25 mi)	Bodmin Moor	English Channel
River Gannel	13 km (8.1 mi)	Carland Cross (50°20′57″N 5°1′32″W)	Atlantic Ocean
Gover Stream	3 km (1.9 mi)		St Austell River
Hamoaze			Plymouth Sound
River Hayle	12 mi (19 km)	Crowan (50°9′25″N 5°16′59″W)	Atlantic Ocean
Helford River	50 km (31 mi)[2]		English Channel (50°5′48″N 5°6′7″W)
River Inny	20 mi (32 km)	Davidstow	River Tamar
River Kensey		Treneglos	River Tamar
Lerryn River		Bodmin Moor	River Fowey (50°22′19″N 4°38′12″W)
River Looe	40.1 km (24.9 mi)[3][4]		English Channel
River Lynher	34 km (21 mi)[5]	Bodmin Moor	Hamoaze
Marsland Water			Atlantic Ocean
River Menalhyl	12 mi (19 km)	Nine Maidens stone row (50°28′15″N 4°54′36″W)	Atlantic Ocean (50°28′0″N 5°2′0″W)
Mylor Creek
River Ottery	33 km (21 mi)	Otterham	River Tamar
Par River			St Austell Bay
Penpol Creek			River Fowey (50°21′32″N 4°38′7″W)
Penpont Water			River Inny
Percuil River	11 km (6.8 mi)	Treworlas (50°12′28″N 4°57′23″W)	Falmouth Bay (50°9′7″N 5°1′16″W)
River Pol	6.4 km (4.0 mi)	Pelynt	Atlantic Ocean
Pont Pill			River Fowey
Port Navas Creek	1 km (0.62 mi)		Helford River
Red River		Towednack	English Channel
Red River	8 mi (13 km)	Bolenowe	Atlantic Ocean
Restronguet Creek	2 mi (3.2 km)		River Fal
St Austell River	20.8 km (12.9 mi)		English Channel
River Seaton	11 mi (18 km)	Caradon Hill	English Channel
River Strat	12.7 mi (20.4 km)	Kilkhampton	Atlantic Ocean (50°49′50″N 4°33′16″W)
River Tamar	98 km (61 mi)		Hamoaze
River Tiddy		Pensilva (50°30′4″N 4°25′24″W)	River Lynher (50°23′17″N 4°17′38″W)
Trevillet River			Atlantic Ocean (50°40′27″N 4°43′48″W)
River Truro			River Fal
River Valency	8.3 km (5.2 mi)	Otterham (50°40′12″N 4°37′4″W)	Atlantic Ocean (50°41′32″N 4°41′57″W)
River Warleggan			River Fowey

• "Rivers and Streams | Cornwall Wildlife Trust". cornwallwildlife.org.uk. Retrieved 23 October 2017.
• "10 Cornish Rivers - B04". cornwallriversproject.org.uk. Retrieved 23 October 2017.
• "Map of Cornwall showing rivers - B04k". cornwallriversproject.org.uk. Retrieved 23 October 2017.
• "South West England | Rivers". The UK Rivers Guidebook. Retrieved 23 October 2017.
• "Rivers and Lakes". Cornish Place Names. Retrieved 23 October 2017.