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 AvonActon Turville
51°31′49″N 2°16′26″W / 51.53028°N 2.27389°W / 51.53028; -2.27389
Severn Estuary, Avonmouth, Bristol
51°30′22″N 2°43′06″W / 51.50611°N 2.71833°W / 51.50611; -2.71833
Hampshire AvonPewsey, Wiltshire
51°22′10″N 1°41′42″W / 51.36944°N 1.69500°W / 51.36944; -1.69500
English Channel, Mudeford, Dorset
50°43′23″N 1°44′53″W / 50.72306°N 1.74806°W / 50.72306; -1.74806
Bissnear Upton Scudamore, Wiltshire
51°13′42″N 2°11′40″W / 51.22833°N 2.19444°W / 51.22833; -2.19444
River Avon at Staverton, Wiltshire
51°20′12″N 2°12′56″W / 51.33667°N 2.21556°W / 51.33667; -2.21556
BlackwaterRedlynch, Wiltshire
50°59′23″N 1°42′44″W / 50.98972°N 1.71222°W / 50.98972; -1.71222
Totton, Hampshire
50°55′36″N 1°29′31″W / 50.92667°N 1.49194°W / 50.92667; -1.49194
BourneBurbage
51°21′09″N 1°40′17″W / 51.35250°N 1.67139°W / 51.35250; -1.67139
Salisbury
51°03′44″N 1°47′22″W / 51.06222°N 1.78944°W / 51.06222; -1.78944
Broadmead Brookwest of Marshfield, Gloucestershire
51°27′24″N 2°21′45″W / 51.45667°N 2.36250°W / 51.45667; -2.36250
Bybrook River north west of Castle Combe
51°29′54″N 2°14′13″W / 51.49833°N 2.23694°W / 51.49833; -2.23694
Brinkworth BrookBroad Hinton, Wiltshire
51°30′7.92″N 1°52′24.6″W / 51.5022000°N 1.873500°W / 51.5022000; -1.873500
Bristol Avon, Great Somerford, Wiltshire
51°32′43.44″N 2°2′17.52″W / 51.5454000°N 2.0382000°W / 51.5454000; -2.0382000
Bybrook RiverPrime: Lower Lapdown Farm, Tormarton, South Gloucestershire
51°29′53.88″N 2°20′34.44″W / 51.4983000°N 2.3429000°W / 51.4983000; -2.3429000
Secondary: Folly Farm, Cold Ashton, South Gloucestershire
51°27′23.4″N 2°21′43.56″W / 51.456500°N 2.3621000°W / 51.456500; -2.3621000
Bristol Avon, Batheaston
51°24′5.76″N 2°18′36.72″W / 51.4016000°N 2.3102000°W / 51.4016000; -2.3102000
Bydemill BrookStanton Country Park, south of Stanton Fitzwarren
51°36′01″N 1°44′50″W / 51.600328°N 1.747239°W / 51.600328; -1.747239
confluence with River Thames
51°40′11″N 1°43′10″W / 51.669759°N 1.719348°W / 51.669759; -1.719348
ChalkeMead End, near Bowerchalke, Wiltshire
51°0′44″N 1°57′56″W / 51.01222°N 1.96556°W / 51.01222; -1.96556
confluence with River Ebble at Broad Chalke
51°1′35″N 1°57′27″W / 51.02639°N 1.95750°W / 51.02639; -1.95750
River Chalke and adjoining fish farm between Mead End, Bowerchalke and Broad Chalke
River Chalke and adjoining fish farm between Mead End, Bowerchalke and Broad Chalke
River ChurnSeven Springs, Gloucestershire
51°51′4″N 2°3′1″W / 51.85111°N 2.05028°W / 51.85111; -2.05028
confluence with River Thames
51°39′14″N 1°51′12″W / 51.65389°N 1.85333°W / 51.65389; -1.85333
Cocklemore BrookStudley, Wiltshire
51°25′2″N 2°4′6″W / 51.41722°N 2.06833°W / 51.41722; -2.06833
River Avon (Bristol) south of Chippenham
51°25′56″N 2°6′7″W / 51.43222°N 2.10194°W / 51.43222; -2.10194
ColeWanborough, Wiltshire
51°32′34″N 1°41′54″W / 51.54278°N 1.69833°W / 51.54278; -1.69833
River Thames
51°41′19″N 1°4′37″W / 51.68861°N 1.07694°W / 51.68861; -1.07694
Damson BrookMilston
51°12′22″N 1°46′08″W / 51.20611°N 1.76889°W / 51.20611; -1.76889
confluence with Nine Mile River
51°11′20″N 1°45′36″W / 51.18889°N 1.76000°W / 51.18889; -1.76000
No picture available
Derry BrookRavensroost Wood, Minety Common
51°35′43″N 1°58′23″W / 51.595278°N 1.973032°W / 51.595278; -1.973032
confluence with Swill Brook south of Ashton Keynes
51°38′17″N 1°55′20″W / 51.638041°N 1.922296°W / 51.638041; -1.922296
No picture available
Doncombe Brooksouth of Marshfield, Gloucestershire
51°27′33″N 2°18′45″W / 51.459253°N 2.312498°W / 51.459253; -2.312498
confluence with Bybrook River at Ford
51°28′14″N 2°14′01″W / 51.470562°N 2.233651°W / 51.470562; -2.233651
River Dun (River Kennet)Great Bedwyn
51°22′16″N 1°36′25″W / 51.37111°N 1.60694°W / 51.37111; -1.60694
River Kennet near Hungerford
51°24′44″N 1°29′39″W / 51.41222°N 1.49417°W / 51.41222; -1.49417
River Dun near Hungerford
River Dun near Hungerford
River Dun (River Test)51°3′12.05″N 1°40′57.62″W / 51.0533472°N 1.6826722°W / 51.0533472; -1.6826722Confluence with River Test near Kimbridge in Hampshire
51°01′50″N 1°32′01″W / 51.030672°N 1.533504°W / 51.030672; -1.533504
River EbbleAlvediston
51°00′46″N 2°02′20″W / 51.0127°N 2.039°W / 51.0127; -2.039
confluence with River Avon
51°02′00″N 1°45′30″W / 51.0334°N 1.7582°W / 51.0334; -1.7582
Gauze BrookLittleton Drew
51°31′35″N 2°14′21″W / 51.5265°N 2.2391°W / 51.5265; -2.2391
River Avon (Bristol) south of Malmesbury
51°33′44″N 2°04′49″W / 51.5623°N 2.0802°W / 51.5623; -2.0802
River KennetSwallowhead Spring near Silbury Hill
51°30′10″N 1°50′42″W / 51.50276°N 1.84507°W / 51.50276; -1.84507
confluence with River Thames at Reading
51°27′33″N 0°56′58″W / 51.459148°N 0.94947°W / 51.459148; -0.94947
KeyBraydon Forest near Purton
51°35′11″N 1°51′57″W / 51.58639°N 1.86583°W / 51.58639; -1.86583
confluence with River Thames near Cricklade
51°38′22″N 1°51′27″W / 51.63944°N 1.85750°W / 51.63944; -1.85750
Lambrok StreamHoopers Pool between Southwick and Rode
51°17′07″N 2°14′57″W / 51.285141°N 2.249281°W / 51.285141; -2.249281
confluence with River Biss at Trowbridge
51°19′18″N 2°13′14″W / 51.321743°N 2.220678°W / 51.321743; -2.220678
River MardenRanscombe Bottom, Calstone Wellington, near Calne
51°24′56″N 2°0′48″W / 51.41556°N 2.01333°W / 51.41556; -2.01333
Bristol Avon near Chippenham
51°27′56″N 2°05′33″W / 51.46556°N 2.09250°W / 51.46556; -2.09250
River NadderSprings at Nadder Head near Donhead St Mary
51°01′01″N 2°10′33″W / 51.016951°N 2.175815°W / 51.016951; -2.175815
Confluence with River Avon (Hampshire) in Salisbury
51°03′38″N 1°47′58″W / 51.060677°N 1.799525°W / 51.060677; -1.799525
Nine MileBrigmerston Down northeast of Bulford Camp
51°13′34″N 1°42′51″W / 51.226017°N 1.714214°W / 51.226017; -1.714214
Confluence of River Avon at Bulford
51°11′20″N 1°46′07″W / 51.188797°N 1.768739°W / 51.188797; -1.768739
Oddford BrookBitham Lake northwest of Tisbury
51°04′26″N 2°06′58″W / 51.073844°N 2.116175°W / 51.073844; -2.116175
confluence with River Nadder at Tisbury
51°03′39″N 2°04′55″W / 51.060750°N 2.082072°W / 51.060750; -2.082072
No picture available
River OgDraycot Foliat
51°29′53″N 1°44′25″W / 51.49806°N 1.74028°W / 51.49806; -1.74028
River Kennet near Marlborough
51°25′13″N 1°43′43″W / 51.42028°N 1.72861°W / 51.42028; -1.72861
River RayWroughton
51°31′24″N 1°47′29″W / 51.52333°N 1.79139°W / 51.52333; -1.79139
Confluence with River Thames

51°38′39″N 1°49′20″W / 51.64417°N 1.82222°W / 51.64417; -1.82222

River Semnear Sedgehill
51°02′51″N 2°11′04″W / 51.047620°N 2.184409°W / 51.047620; -2.184409
near Wardour
51°02′45″N 2°06′37″W / 51.045790°N 2.110142°W / 51.045790; -2.110142
No picture available
Semington BrookThe Warren south of West Lavington
51°15′53″N 1°59′46″W / 51.264651°N 1.996125°W / 51.264651; -1.996125
confluence with River Avon (Bristol) near Whaddon
51°21′11″N 2°10′19″W / 51.353071°N 2.171855°W / 51.353071; -2.171855
River Stour, DorsetStourhead
51°06′17″N 2°19′36″W / 51.104584°N 2.326786°W / 51.104584; -2.326786
English Channel at Christchurch, Dorset
50°43′41″N 1°46′23″W / 50.72796°N 1.77295°W / 50.72796; -1.77295
Summerham Brooknorth of Rowde
51°21′39″N 2°00′51″W / 51.360947°N 2.014142°W / 51.360947; -2.014142
confluence with Semington Brook, south of Seend Cleeve
51°19′56″N 2°05′54″W / 51.332359°N 2.098262°W / 51.332359; -2.098262
Swill Brookconfluence of Braydon Brook and Flagham Brook near Somerford Keynes
51°38′19″N 1°58′36″W / 51.638517°N 1.976646°W / 51.638517; -1.976646
confluence with River Thames at Ashton Keynes
51°38′20″N 1°55′25″W / 51.638890°N 1.923656°W / 51.638890; -1.923656
Tetbury AvonWor Well, Tetbury
51°38′36″N 2°08′33″W / 51.6432°N 2.1424°W / 51.6432; -2.1424
River Avon (Bristol) at Malmesbury
51°34′56″N 2°05′34″W / 51.5821°N 2.09289°W / 51.5821; -2.09289
Thamesenters Wiltshire to the east of Ashton Keynesleaves Wiltshire to the southwest of Lechlade-on-Thames
Tillnear Tilshead
51°13′49″N 1°57′21″W / 51.23028°N 1.95583°W / 51.23028; -1.95583
confluence with River Wylye near Stapleford
51°08′09″N 1°54′07″W / 51.13583°N 1.90194°W / 51.13583; -1.90194
Woodbridge BrookMidgehall Copse near Lydiard Millicent
51°33′38″N 1°54′41″W / 51.5605°N 1.9115°W / 51.5605; -1.9115
confluence with River Avon (Bristol) near MalmesburyNo picture available
WylyeRodmead Farm near Maiden Bradley
51°07′25″N 2°18′11″W / 51.12361°N 2.30306°W / 51.12361; -2.30306
Confluence with River Nadder
51°04′45″N 1°51′45″W / 51.07917°N 1.86250°W / 51.07917; -1.86250
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