List of rivers of Wiltshire

This is a list of rivers and natural waterways that flow either wholly or partially through the ceremonial county of Wiltshire. The list is not comprehensive as there are many small brooks and streams without a recorded name on most official maps. There are three notable rivers that flow through the county: the River Avon (Bristol), the River Avon (Hampshire) and the River Thames.

Due to the geology of the county, the rivers and waterways discharge to the west, east and south. In addition to the natural waterways, the Kennet and Avon Canal crosses the county.

Name	Source	Mouth	Image
Bristol Avon	Acton Turville 51°31′49″N 2°16′26″W	Severn Estuary, Avonmouth, Bristol 51°30′22″N 2°43′06″W
Hampshire Avon	Pewsey, Wiltshire 51°22′10″N 1°41′42″W	English Channel, Mudeford, Dorset 50°43′23″N 1°44′53″W
Biss	near Upton Scudamore, Wiltshire 51°13′42″N 2°11′40″W	River Avon at Staverton, Wiltshire 51°20′12″N 2°12′56″W
Blackwater	Redlynch, Wiltshire 50°59′23″N 1°42′44″W	Totton, Hampshire 50°55′36″N 1°29′31″W
Bourne	Burbage 51°21′09″N 1°40′17″W	Salisbury 51°03′44″N 1°47′22″W
Broadmead Brook	west of Marshfield, Gloucestershire 51°27′24″N 2°21′45″W	Bybrook River north west of Castle Combe 51°29′54″N 2°14′13″W
Brinkworth Brook	Broad Hinton, Wiltshire 51°30′7.92″N 1°52′24.6″W	Bristol Avon, Great Somerford, Wiltshire 51°32′43.44″N 2°2′17.52″W
Bybrook River	Prime: Lower Lapdown Farm, Tormarton, South Gloucestershire 51°29′53.88″N 2°20′34.44″W Secondary: Folly Farm, Cold Ashton, South Gloucestershire 51°27′23.4″N 2°21′43.56″W	Bristol Avon, Batheaston 51°24′5.76″N 2°18′36.72″W
Bydemill Brook	Stanton Country Park, south of Stanton Fitzwarren 51.600328°N 1.747239°W / 51.600328; -1.747239	confluence with River Thames 51.669759°N 1.719348°W / 51.669759; -1.719348
Chalke	Mead End, near Bowerchalke, Wiltshire 51°0′44″N 1°57′56″W	confluence with River Ebble at Broad Chalke 51°1′35″N 1°57′27″W	River Chalke and adjoining fish farm between Mead End, Bowerchalke and Broad Chalke
River Churn	Seven Springs, Gloucestershire 51°51′4″N 2°3′1″W	confluence with River Thames 51°39′14″N 1°51′12″W
Cocklemore Brook	Studley, Wiltshire 51°25′2″N 2°4′6″W	River Avon (Bristol) south of Chippenham 51°25′56″N 2°6′7″W
Cole	Wanborough, Wiltshire 51°32′34″N 1°41′54″W	River Thames 51°41′19″N 1°4′37″W
Damson Brook	Milston 51°12′22″N 1°46′08″W	confluence with Nine Mile River 51°11′20″N 1°45′36″W	No picture available
Derry Brook	Ravensroost Wood, Minety Common 51.595278°N 1.973032°W / 51.595278; -1.973032	confluence with Swill Brook south of Ashton Keynes 51.638041°N 1.922296°W / 51.638041; -1.922296	No picture available
Doncombe Brook	south of Marshfield, Gloucestershire 51.459253°N 2.312498°W / 51.459253; -2.312498	confluence with Bybrook River at Ford 51.470562°N 2.233651°W / 51.470562; -2.233651
River Dun (River Kennet)	Great Bedwyn 51°22′16″N 1°36′25″W	River Kennet near Hungerford 51°24′44″N 1°29′39″W	River Dun near Hungerford
River Dun (River Test)	51°3′12.05″N 1°40′57.62″W	Confluence with River Test near Kimbridge in Hampshire 51.030672°N 1.533504°W / 51.030672; -1.533504
River Ebble	Alvediston 51.0127°N 2.039°W / 51.0127; -2.039	confluence with River Avon 51.0334°N 1.7582°W / 51.0334; -1.7582
Gauze Brook	Littleton Drew 51.5265°N 2.2391°W / 51.5265; -2.2391	River Avon (Bristol) south of Malmesbury 51.5623°N 2.0802°W / 51.5623; -2.0802
River Kennet	Swallowhead Spring near Silbury Hill 51.50276°N 1.84507°W / 51.50276; -1.84507	confluence with River Thames at Reading 51.459148°N 0.94947°W / 51.459148; -0.94947
Key	Braydon Forest near Purton 51°35′11″N 1°51′57″W	confluence with River Thames near Cricklade 51°38′22″N 1°51′27″W
Lambrok Stream	Hoopers Pool between Southwick and Rode 51.285141°N 2.249281°W / 51.285141; -2.249281	confluence with River Biss at Trowbridge 51.321743°N 2.220678°W / 51.321743; -2.220678
River Marden	Ranscombe Bottom, Calstone Wellington, near Calne 51°24′56″N 2°0′48″W	Bristol Avon near Chippenham 51°27′56″N 2°05′33″W
River Nadder	Springs at Nadder Head near Donhead St Mary 51.016951°N 2.175815°W / 51.016951; -2.175815	Confluence with River Avon (Hampshire) in Salisbury 51.060677°N 1.799525°W / 51.060677; -1.799525
Nine Mile	Brigmerston Down northeast of Bulford Camp 51.226017°N 1.714214°W / 51.226017; -1.714214	Confluence of River Avon at Bulford 51.188797°N 1.768739°W / 51.188797; -1.768739
Oddford Brook	Bitham Lake northwest of Tisbury 51.073844°N 2.116175°W / 51.073844; -2.116175	confluence with River Nadder at Tisbury 51.060750°N 2.082072°W / 51.060750; -2.082072	No picture available
River Og	Draycot Foliat 51°29′53″N 1°44′25″W	River Kennet near Marlborough 51°25′13″N 1°43′43″W
River Ray	Wroughton 51°31′24″N 1°47′29″W	Confluence with River Thames 51°38′39″N 1°49′20″W
River Sem	near Sedgehill 51.047620°N 2.184409°W / 51.047620; -2.184409	near Wardour 51.045790°N 2.110142°W / 51.045790; -2.110142	No picture available
Semington Brook	The Warren south of West Lavington 51.264651°N 1.996125°W / 51.264651; -1.996125	confluence with River Avon (Bristol) near Whaddon 51.353071°N 2.171855°W / 51.353071; -2.171855
River Stour, Dorset	Stourhead 51.104584°N 2.326786°W / 51.104584; -2.326786	English Channel at Christchurch, Dorset 50.72796°N 1.77295°W / 50.72796; -1.77295
Summerham Brook	north of Rowde 51.360947°N 2.014142°W / 51.360947; -2.014142	confluence with Semington Brook, south of Seend Cleeve 51.332359°N 2.098262°W / 51.332359; -2.098262
Swill Brook	confluence of Braydon Brook and Flagham Brook near Somerford Keynes 51.638517°N 1.976646°W / 51.638517; -1.976646	confluence with River Thames at Ashton Keynes 51.638890°N 1.923656°W / 51.638890; -1.923656
Tetbury Avon	Wor Well, Tetbury 51.6432°N 2.1424°W / 51.6432; -2.1424	River Avon (Bristol) at Malmesbury 51.5821°N 2.09289°W / 51.5821; -2.09289
Thames	enters Wiltshire to the east of Ashton Keynes	leaves Wiltshire to the southwest of Lechlade-on-Thames
Till	near Tilshead 51°13′49″N 1°57′21″W	confluence with River Wylye near Stapleford 51°08′09″N 1°54′07″W
Woodbridge Brook	MIdgehall Copse near Lydiard Millicent 51.5605°N 1.9115°W / 51.5605; -1.9115	confluence with River Avon (Bristol) near Malmesbury	No picture available
Wylye	Rodmead Farm near Maiden Bradley 51°07′25″N 2°18′11″W	Confluence with River Nadder 51°04′45″N 1°51′45″W