List of rivers of the United Kingdom

	River	Length	(km)	Country
1	River Severn River Severn The River Severn is the longest river in Great Britain, at about , but the second longest on the British Isles, behind the River Shannon. It rises at an altitude of on Plynlimon, Ceredigion near Llanidloes, Powys, in the Cambrian Mountains of mid Wales...	220	354	England England England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental... /Wales Wales Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...
2	River Thames River Thames The River Thames flows through southern England. It is the longest river entirely in England and the second longest in the United Kingdom. While it is best known because its lower reaches flow through central London, the river flows alongside several other towns and cities, including Oxford,...	215	346	England
3	River Trent River Trent The River Trent is one of the major rivers of England. Its source is in Staffordshire on the southern edge of Biddulph Moor. It flows through the Midlands until it joins the River Ouse at Trent Falls to form the Humber Estuary, which empties into the North Sea below Hull and Immingham.The Trent...	185	297	England
4	River Great Ouse River Great Ouse The Great Ouse is a river in the east of England. At long, it is the fourth-longest river in the United Kingdom. The river has been important for navigation, and for draining the low-lying region through which it flows. Its course has been modified several times, with the first recorded being in...	143	230	England
5	River Wye River Wye The River Wye is the fifth-longest river in the UK and for parts of its length forms part of the border between England and Wales. It is important for nature conservation and recreation.-Description:...	135	215	England/Wales
6	River Ure River Ure The River Ure is a river in North Yorkshire, England, approximately long from its source to the point where it changes name to the River Ouse. It is the principal river of Wensleydale, which is the only one of the Dales now named after a village rather than its river... /River Ouse, Yorkshire River Ouse, Yorkshire The River Ouse is a river in North Yorkshire, England. The river is formed from the River Ure at Cuddy Shaw Reach near Linton-on-Ouse, about 6 miles downstream of the confluence of the River Swale with the River Ure...	129	208	England
7	River Tay River Tay The River Tay is the longest river in Scotland and the seventh-longest in the United Kingdom. The Tay originates in western Scotland on the slopes of Ben Lui , then flows easterly across the Highlands, through Loch Dochhart, Loch Lubhair and Loch Tay, then continues east through Strathtay , in...	117	188	Scotland Scotland Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...
8	River Spey River Spey The River Spey is a river in the northeast of Scotland, the second longest and the fastest-flowing river in Scotland...	107	172	Scotland
9	River Clyde River Clyde The River Clyde is a major river in Scotland. It is the ninth longest river in the United Kingdom, and the third longest in Scotland. Flowing through the major city of Glasgow, it was an important river for shipbuilding and trade in the British Empire....	106	172	Scotland
10	River Nene River Nene The River Nene is a river in the east of England that rises from three sources in the county of Northamptonshire. The tidal river forms the border between Cambridgeshire and Norfolk for about . It is the tenth longest river in the United Kingdom, and is navigable for from Northampton to The...	100	161	England
11	River Tweed River Tweed The River Tweed, or Tweed Water, is long and flows primarily through the Borders region of Great Britain. It rises on Tweedsmuir at Tweed's Well near where the Clyde, draining northwest, and the Annan draining south also rise. "Annan, Tweed and Clyde rise oot the ae hillside" as the Border saying...	96	155	England/Scotland
12	River Avon, Warwickshire River Avon, Warwickshire The River Avon or Avon is a river in or adjoining the counties of Leicestershire, Northamptonshire, Warwickshire, Worcestershire and Gloucestershire in the Midlands of England...	96	154	England
13	River Eden, Cumbria River Eden, Cumbria The River Eden is a river that flows through Cumbria, England on its way to the Solway Firth.-Course of river:The Eden rises in Black Fell Moss, Mallerstang, on the high ground between High Seat, Yorkshire Dales and Hugh Seat. Here it forms the boundary between the counties of Cumbria and North...	90	145	England
14	River Dee, Aberdeenshire River Dee, Aberdeenshire The River Dee is a river in Aberdeenshire, Scotland. It rises in the Cairngorms and flows through Strathdee to reach the North Sea at Aberdeen...	87	140	Scotland
15	River Witham River Witham The River Witham is a river, almost entirely in the county of Lincolnshire, in the east of England. It rises south of Grantham close to South Witham, at SK8818, passes Lincoln at SK9771 and at Boston, TF3244, flows into The Haven, a tidal arm of The Wash, near RSPB Frampton Marsh...	82	132	England
16	River Teme River Teme The River Teme rises in Mid Wales, south of Newtown in Powys, and flows through Knighton where it crosses the border into England down to Ludlow in Shropshire, then to the north of Tenbury Wells on the Shropshire/Worcestershire border there, on its way to join the River Severn south of Worcester...	81	130	England/Wales
17	River Don, Aberdeenshire River Don, Aberdeenshire The River Don is a river in north-east Scotland. It rises in the Grampians and flows eastwards, through Aberdeenshire, to the North Sea at Aberdeen. The Don passes through Alford, Kemnay, Inverurie, Kintore, and Dyce...	80	129	Scotland
18	River Bann River Bann The River Bann is the longest river in Northern Ireland, the total length being 80 miles . The river winds its way from the south east corner of Northern Ireland to the north west coast, pausing in the middle to widen into the enormous Lough Neagh...	76	122	Northern Ireland Northern Ireland Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...
=19	River Ribble River Ribble The River Ribble is a river that runs through North Yorkshire and Lancashire, in northern England. The river's drainage basin also includes parts of Greater Manchester around Wigan.-Geography:...	75	120	England
=19	River Avon, Bristol River Avon, Bristol The River Avon is an English river in the south west of the country. To distinguish it from a number of other River Avons in Britain, this river is often also known as the Lower Avon or Bristol Avon...	75	120	England
21	River Tyne	73	118	England
22	River Derwent, Yorkshire River Derwent, Yorkshire The Derwent is a river in Yorkshire in the north of England. It is used for water abstraction, leisure and sporting activities and effluent disposal as well as being of significant importance as the site of several nature reserves...	72	115	England
=23	River Aire River Aire The River Aire is a major river in Yorkshire, England of length . Part of the river is canalised, and is known as the Aire and Calder Navigation....	71	114	England
=23	River Nith River Nith The River Nith is a river in South West Scotland.-Source, flow and mouth:The Nith rises in the Carsphairn hills of East Ayrshire, more precisely between Prickeny Hill and Enoch Hill, 7 km East of Dalmellington...	71	114	Scotland
=25	River Tees River Tees The River Tees is in Northern England. It rises on the eastern slope of Cross Fell in the North Pennines, and flows eastwards for 85 miles to reach the North Sea between Hartlepool and Redcar.-Geography:...	70	113	England
=25	River Medway River Medway The River Medway, which is almost entirely in Kent, England, flows for from just inside the West Sussex border to the point where it enters the Thames Estuary....	70	113	England
=25	River Mersey River Mersey The River Mersey is a river in North West England. It is around long, stretching from Stockport, Greater Manchester, and ending at Liverpool Bay, Merseyside. For centuries, it formed part of the ancient county divide between Lancashire and Cheshire....	70	113	England
=28	River Dee, Wales River Dee, Wales The River Dee is a long river in the United Kingdom. It travels through Wales and England and also forms part of the border between the two countries....	70	112	England/Wales
=28	River Don, South Yorkshire	70	112	England

There seems to be little consensus as to the lengths of rivers in published sources, nor much agreement as to what constitutes a river. Thus the River Ure / River Ouse can be counted as one river system or two rivers. If it is counted as one, the River Aire

River Aire

The River Aire is a major river in Yorkshire, England of length . Part of the river is canalised, and is known as the Aire and Calder Navigation....

/ Yorkshire Ouse

River Ouse, Yorkshire

The River Ouse is a river in North Yorkshire, England. The river is formed from the River Ure at Cuddy Shaw Reach near Linton-on-Ouse, about 6 miles downstream of the confluence of the River Swale with the River Ure...

/ Humber

Humber

The Humber is a large tidal estuary on the east coast of Northern England. It is formed at Trent Falls, Faxfleet, by the confluence of the tidal River Ouse and the tidal River Trent. From here to the North Sea, it forms part of the boundary between the East Riding of Yorkshire on the north bank...

system would come fourth in the list, with a combined length of 161 miles (259.1 km). Sue Owen et. al. in their book on Rivers generally restrict the length to the parts that bear the correct name. Thus the River Nene is quoted at 100 miles (160.9 km), but would be around 5 miles (8 km) more if the variously named sources were included. Many of the above lengths are considerably different to Owen's list, some longer and some shorter.

See also