This is an alphabetical list of the main rivers in Ireland as a whole. It includes rivers that flow through the Republic of Ireland and Northern Ireland. Rivers that flow through Northern Ireland are marked with an asterisk (*). The major rivers have their length (in miles and kilometres) given. Also shown are two tables. Table 1 shows the longest rivers in Ireland with their lengths (in miles and kilometres), the counties they flow through, and their catchment areas (in km2). Table 2 shows the largest rivers in Ireland (by mean flow) in cubic meters per second.
Lengths obtained from the Ordnance Survey of Ireland: Rivers and their Catchment Basins 1958 (Table of Reference), and for the rivers Bann and Erne - Notes on River Basins by Robert A. Williams
TABLE 1
a
The length of the River Shannon from the Shannon Pot to Limerick City is 258 kilometres (160 mi) with a basin area of 11,700 km2.
The River Shannon's overall length (to Loop Head), using the Owenmore River (Glangevlin) as source, is 372 kilometres (231 mi), 11 km (7 mi) longer than the Shannon Pot source.
The River Shannon's overall length (to Loop Head), using the Boyle River's furthest source, is 392.1 kilometres (243.6 mi), making the Boyle-Shannon river the longest natural stream flow (source to sea) in Ireland, 31.6 km (19.5 mi) longer than the Shannon Pot source.
The River Shannon is a traditional freshwater river for just about 45% of its total length. Excluding the 102.2-kilometre (63.5 mi) tidal estuary from its total length of 360 kilometres (224 mi), if one also excludes the lakes (L. Derg 39 kilometres (24 mi), L. Ree 29 kilometres (18 mi), L. Allen 11 kilometres (7 mi) plus L. Boderg, L. Bofin, L. Forbes, L. Corry) from the Shannon's freshwater flow of 258.3 kilometres (160.5 mi), the Shannon as a freshwater river is only about 160 kilometres (100 mi) long.
b
The total basin area of the Three Sisters (Barrow, Nore and Suir) is 9,207 km2.
c
The traditional length given for the River Bann is 80 miles (129 km) which is the combined total length of Upper and Lower Bann rivers and doesn't include Lough Neagh.
The total length of the Ulster Blackwater from its source to the sea via L. Neagh and the Lower Bann is 186.3 km (115.75 mi), surpassed, in Ireland, only by the Shannon and Barrow rivers. This is the longest stream flow (source to sea) in Ulster.
d
The total basin area of the 6 km River Corrib is 3,138 km2
The total length of the River Robe's journey from its source near Ballyhaunis to Galway Bay (via Lough Mask, Cong canal and river, Lough Corrib and River Corrib) is 72 miles (116 km). This is the longest stream flow (source to sea) within the Corrib Basin.
Abbert River 25.25 miles (40.64 km)
Aghinrawn* (Fermanagh) See Owenbrean River
Agivey* 20.5 miles (33.0 km) (Londonderry)
Aherlow River 27 miles (43 km) (Tipperary)
River Aille 18.5 miles (29.8 km)
Allaghaun River 13.75 miles (22.13 km) (Limerick)
River Allow 22.75 miles (36.61 km) (Cork)
Allow, County Cork (Blackwater) 22.75 miles (36.61 km)
Altalacky* (Londonderry)
Annacloy* (Down)
Annascaul (Kerry)
River Annalee 41.75 miles (67.19 km)
River Anner 23.5 miles (37.8 km) (Tipperary)
River Ara 18.25 miles (29.37 km) (Tipperary)
Argideen River 17.75 miles (28.57 km) (Cork)
Arigna River 14 miles (23 km)
Arney* (Fermanagh)
Athboy River 22.5 miles (36.2 km) (Meath)
Aughavaud River, County Carlow
Aughrim River 5.75 miles (9.25 km) (Wicklow)
River Avoca (Ovoca) 9.5 miles (15.3 km) (Wicklow)
River Avonbeg 16.5 miles (26.6 km) (Wicklow)
River Avonmore 22.75 miles (36.61 km) (Wicklow)
Awbeg (Munster Blackwater) 31.75 miles (51.10 km)
Baelanabrack River 11 miles (18 km)
Baleally Stream, County Dublin
River Ballinamallard* 16 miles (26 km)
Ballinascorney Stream, County Dublin
Ballinderry River* 29 miles (47 km)
Ballinglen River, County Mayo
Ballintotty River, County Tipperary
Ballintra River 14 miles (23 km)
Ballisodare River 5.5 miles (8.9 km)
Ballyboughal River, County Dublin
Ballycassidy*
Ballyfinboy River 20.75 miles (33.39 km)
Ballymaice Stream, County Dublin
Ballymeeny River, County Sligo
Ballynahatty*
Ballynahinch River* 18.5 miles (29.8 km)
Ballyogan Stream, County Dublin
Balsaggart Stream, County Dublin
Bandon 45 miles (72 km)
River Bann (Wexford) 26 miles (42 km)
Bann* 90 miles (140 km) — longest river in Northern Ireland. Upper Bann flows into Lough Neagh and then continues north as the Lower Bann.
Bannagh*
Barrow 119.5 miles (192.3 km)
Bartramstown River, County Dublin
Belderg River, County Mayo
Bellanaminnaun River, County Mayo
Bellawaddy River, County Sligo
Bilboa River 19.5 miles (31.4 km)
River Black 17.75 miles (28.57 km) County Mayo
Blackbanks Stream, County Dublin
Blackditch Stream, County Dublin
Blackwater, Kerry
River Blackwater, Kildare and Meath 20 miles (32 km)
River Blackwater, Cavan and Meath 42.5 miles (68.4 km)
Blackwater, Munster 104.5 miles (168.2 km)
River Blackwater (Ulster)* 56.7 miles (91.2 km)
Bloody Stream, County Dublin
Boggeen Stream, County Dublin
Boherboy Stream, County Dublin
Boyle River (Total) 40 miles (64 km)
River Boyne 70 miles (110 km)
Bracken River, County Dublin
Bracken, Balbriggan
River Bradoge, County Dublin
Breedoge River 11.75 miles (18.91 km)
River Bride 40 miles (64 km) (Blackwater)
River Bride 21 miles (34 km) (Lee)
Bride's Glen Stream, County Dublin
Bride's Stream, County Dublin
Broad Meadow River, County Dublin
Brockey Stream, County Dublin
Broghane Stream, County Kerry
Brook Stream, County Dublin
Brosna 49.25 miles (79.26 km)
Brownsbarn Stream, County Dublin
Bungosteen River 15.5 miles (24.9 km)
Bunowen River (Galway) 16 miles (26 km)
Bunowen River (Mayo) 13.25 miles (21.32 km)
Bunratty River 25 miles (40 km)
Burntollet*
Burren River 24 miles (39 km)
River Bush* 33.5 miles (53.9 km)
Cabragh River, County Sligo
River Callan* 26.5 miles (42.6 km)
River Camac, County Dublin
River Camcor 16.25 miles (26.15 km)
Camlin River 27 miles (43 km)
Camlough*
Camowen River* 28 miles (45 km)
Caragh River 14 miles (23 km)
Carey*
Carn River, County Mayo
Carrickbrack Stream, County Dublin
Carrickmines River, County Dublin
River Clare (via Lough Corrib) 57.75 miles (92.94 km)
Carrowbeg 10 miles (16 km)
Carryduff*
Carysfort-Maretimo Stream, County Dublin
Cashla River 13.25 miles (21.32 km)
Castle Stream, County Dublin
Castletown River 28 miles (45 km)
Cemetery Drain, County Dublin
River Cladagh* (including Arney) 22 miles (35 km)
Clady*
Clanrye*
Claremont Stream, County Dublin
River Clarin 19.75 miles (31.78 km)
River Clodiagh 20.5 miles (33.0 km)
Clodiagh River 24.25 miles (39.03 km)
Cloghfin River 14 miles (23 km)
Cloonaghmore River 19.75 miles (31.78 km)Colebrooke River* 35 miles (56 km)
River Colligan 15 miles (24 km)
Commons Water, County Dublin
Coolcour Brook, County Dublin
Corduff River, County Dublin
River Corrib 5.75 miles (9.25 km)
Cot Brook, County Dublin
County Brook, County Dublin
River Crana 12 miles (19 km)
Cregg River (via Lough Corrib)
Creosote Stream, County Dublin
Crinken Stream, County Dublin
Crompaun River, County Clare
Crumlin*
Cuckoo Stream, County Dublin
Cully Water 14.5 miles (23.3 km)
Cumber*
Cummeragh River 9.5 miles (15.3 km)
Cusher River* 25 miles (40 km)
Dale River 22.5 miles (36.2 km)
Dall*
River Dalua 15.5 miles (24.9 km)
River Dargle 12.5 miles (20.1 km)
River Dee, County Louth 37.75 miles (60.75 km)
River Deel 39.5 miles (63.6 km)
Deel River 28 miles (45 km)
River Deele 25.5 miles (41.0 km)
Dennett*
River Derg* 28 miles (45 km)
Derreen River 25 miles (40 km)
River Derry 21 miles (34 km)
Delvin River, County Dublin
Devlin River, County Sligo
Dervock*
River Diran 24.75 miles (39.83 km)
River Dodder 17 miles (27 km)
River Doonbeg 25.75 miles (41.44 km)
Dooyertha River 23.75 miles (38.22 km)
Drimnagh Castle Stream, County Dublin
River Drish 19.75 miles (31.78 km)
Dromaddamore River, County Kerry
Dromore River* 23.25 miles (37.42 km)
Drumquin River* 9.5 miles (15.3 km)
Drumragh River* 20.5 miles (33.0 km)
Duff* 13.25 miles (21.32 km)
Dun* (Glendun) 12 miles (19 km)
Easky River, County Sligo 18.5 miles (29.8 km)
Elm Park Stream, County Dublin
Enler, County Down
River Erkina 22.5 miles (36.2 km)
River Erne* 80 miles (130 km)
River Erriff 20.5 miles (33.0 km)
River Eske 15.25 miles (24.54 km)
River Fane, County Louth 38.25 miles (61.56 km)
Fairy Water 17.75 miles (28.57 km)
Farset*
River Faughan* 29.5 miles (47.5 km)
River Feale 46 miles (74 km)
River Fergus 36.5 miles (58.7 km)
Feorish River 19.5 miles (31.4 km)
River Ferta, County Kerry
Fettercairn Stream, County Dublin
Fiddaun River, County Mayo
Figile River (Kildare) 20.75 miles (33.39 km)
Finglas River, County Dublin
Finglaswood Stream, County Dublin
River Finisk 17.5 miles (28.2 km)
River Finn (County Donegal) (Foyle) — rises and flows mainly through County Donegal, Republic of Ireland 39.25 miles (63.17 km)
River Finn (Erne tributary) (Erne) 31.5 miles (50.7 km)
Finned River, County Sligo
River Flesk 28.25 miles (45.46 km)
Flurry River, County Louth*
Forrest Little Stream, County Dublin
River Foyle* 80 miles (130 km) (total) — that portion named "Foyle" forms the border between the Republic of Ireland and Northern Ireland
Fox Stream, County Dublin
Foxrock Stream, County Dublin
River Funshion 34.75 miles (55.92 km)
Fury*
Furry Glen Stream, County Dublin
River Galey 27 miles (43 km)
Gallanstown Stream, County Dublin
Gallblack Stream, County Dublin
River Garavogue (including L. Gill and R. Bonnet) 31.5 miles (50.7 km)
Gay Brook Stream, County Dublin
Glashaboy River 15 miles (24 km)
Glashoreag River, County Kerry
Glasthule Stream, County Dublin
Glen*
Glenamoy River County Mayo 13.75 miles (22.13 km)
Glenamuck Stream, County Dublin
Glenariff*
Glenaulin Stream, County Dublin
Glencullen River, County Dublin
Glendergan*
Glenelly River* 22 miles (35 km)
Glenglassera River, County Mayo
Glenmornan*
Glenulra River, County Mayo
River Glore 17 miles (27 km)
River Glyde 34.75 miles (55.92 km)
Golf Stream, County Dublin
River Goul 23.25 miles (37.42 km)
Grange Stream, County Dublin
Grange River (Corrib) 17 miles (27 km)
River Greese 22 miles (35 km)
Griffeen River, County Dublin
River Gweebarra 19.75 miles (31.78 km)
Gweestin River 13.75 miles (22.13 km)
Gweestion River (Moy) 23 miles (37 km)
Hampstead Stream, County Dublin
Hazelbrook Stream, County Dublin
Heathfield River, County Mayo
Hurley River, County Dublin
River Ilen County Cork 20.75 miles (33.39 km)
River Inagh 22.75 miles (36.61 km)
River Inny (Leinster) 55.5 miles (89.3 km)
River Inny (County Kerry) 16.5 miles (26.6 km)
Jobstown Stream, County Dublin
John's
Joan Slade River, County Kildare
Keady*
Kealy's Stream, County Dublin
Kells*
Kilbarrack Stream, County Dublin
Kilbroney*
Kilcolgan River 9.5 miles (15.3 km)
Kill o' the Grange Stream, County Dublin
Kings River 28.75 miles (46.27 km)
River Lagan* 53.5 miles (86.1 km)
River Laune 14 miles (23 km)
Leaffony River, County Sligo
River Lee 55.5 miles (89.3 km)
River Lennon (Leannan) 28.5 miles (45.9 km)
River Liffey, County Wicklow, County Kildare, and County Dublin 82 miles (132 km)
Lissenhall Stream, County Dublin
Little Brosna River 36 miles (58 km)
Little Dargle River, County Dublin
Lung River (Boyle) 17.75 miles (28.57 km)
Lyreen River, County Kildare
Mabestown Stream, County Dublin
Magazine Stream, County Dublin
River Mahon 15.75 miles (25.35 km)
River Maigue 38.75 miles (62.36 km)
River Maine 26.5 miles (42.6 km)
Maine* 34 miles (55 km)
Mareen's Brook, County Dublin
Manulla River 19 miles (31 km)
Mayne River, County Dublin
Mill Stream, County Dublin
Milverton Stream, County Dublin
Monkstown Stream, County Dublin
Mournebeg River* 17.25 miles (27.76 km)
Mourne*
River Moy 62.5 miles (100.6 km)
Moynalty River 23.5 miles (37.8 km)
Moyola River* 31 miles (50 km)
Muckross Stream, County Dublin
Mulkear River 15.25 miles (24.54 km)
Munkin River, County Mayo
Naniken River, County Dublin
Nanny River. Meath
Nenagh River 28.5 miles (45.9 km)
Newport River 18.25 miles (29.37 km)
Newry (Clanrye) River* 27 miles (43 km)
River Nore 87.75 miles (141.22 km)
Nutley Stream, County Dublin
Offington Stream, County Dublin
Oily River 13 miles (21 km)
Ollatrim River (Tipperary) 18.5 miles (29.8 km)
Oona Water* 17.75 miles (28.57 km)
River Owenabue 20.5 miles (33.0 km)
Owenacurra River 13.25 miles (21.32 km)
Owenaher River, County Louth
Owenass River, County Laois
Owenbeg River 14.75 miles (23.74 km)
Owenbehy River, County Mayo
Owenboliska River 13.25 miles (21.32 km)
Owenbrean* 5 mi (8.5 km)
Owendoher River, County Dublin
Owenduff River 17.75 miles (28.57 km)
Owenea River 16.25 miles (26.15 km)
Owengarve River 16 miles (26 km)
Owenglin River 11.5 miles (18.5 km)
Owenmore River (Glangevlin) 9 miles (14 km)
Owenmore River (inc Carrowmore Lough) 29.25 miles (47.07 km)
Owenmore River (Sligo) 32.5 miles (52.3 km)
Owenkillew River 30 miles (48 km)
Owenreagh River 14 miles (23 km)
River Owenroe (Moynalty) 23.5 miles (37.8 km)
River Owentaraglen 17.25 miles (27.76 km)
Philipstown River (Barrow) 15.75 miles (25.35 km)
East Pinkeen Stream, County Dublin
West Pinkeen Stream, County Dublin
Piperstown Stream, County Dublin
River Poddle, County Dublin
Pollymounty River, County Carlow, also spelled Pollmounty or Poulmonty.
Portrane Stream, County Dublin
Priory Stream, County Dublin
Quiggery*
River Quoile 27.5 miles (44.3 km)
Racecourse Stream, County Dublin
River Reelan* 10.5 miles (16.9 km)
Richardstown River, County Dublin
River Robe (via Loughs Mask and Corrib) 39.25 miles (63.17 km)
Robinhood Stream, County Dublin
River Roe* 34.25 miles (55.12 km)
Roogagh*
Rosserk River, County Mayo
Roughty River 16.75 miles (26.96 km) (flowing into Kenmare Bay) at Kenmare
Routing Burn 13 miles (21 km)
Rush Town Stream, County Dublin
River Rye 15.5 miles (24.9 km)
St. Laurence's Stream, County Dublin
St. Margaret's Stream, County Dublin
Santa Sabina Stream, County Dublin
Santry River, County Dublin
Scribblestown Stream, County Dublin
Shallon Stream, County Dublin
Shanganagh River, County Dublin
River Shannon 224 miles (360 km) — longest river on the island. Develops into Lough Allen, Lough Bofin, Lough Ree and Lough Derg along its course.
Shanow River 15.25 miles (24.54 km)
Shimna*
River Shiven 21.25 miles (34.20 km)
Shournagh River 17 miles (27 km)
Sillees River* 33 miles (53 km)
Silver River 24 miles (39 km)
Six Mile Water* 21 miles (34 km)
Slade Brook, County Dublin
River Slaney, County Wicklow, County Carlow and County Wexford 73 miles (117 km)
Slang River, County Dublin
River Slate 17 miles (27 km)
Sluice River, County Dublin
Smerlagh (Smaorlagh) River 15.5 miles (24.9 km)
Sruh Croppa*
Stein River, County Dublin
Stonestown River 20 miles (32 km)
Stoneyford
River Strule* 14.25 miles (22.93 km)
River Suck 82.5 miles (132.8 km)
River Suir 114.75 miles (184.67 km)
River Sullane 22.5 miles (36.2 km)
Swan River, County Dublin
River Swanlinbar 18 miles (29 km) (also known as Cladagh)*
River Swilly 25.5 miles (41.0 km)
Tallaght Stream, County Dublin
River Tall* 22.5 miles (36.2 km)
River Tang 15.5 miles (24.9 km)
River Tar 18.75 miles (30.18 km)
Torrent*
Tempo*
Termon*
Three Arches*
Threemilewater*
River Tolka 20.75 miles (33.39 km)
River Torrent* 25 miles (40 km)
River Triogue 16.75 miles (26.96 km)
Trimleston Stream, County Dublin
Tromanallison, County Dublin
Tullamore River 12.5 miles (20.1 km)
Turnapin Stream, County Dublin
Turvey River, County Dublin
Unshin River 14.25 miles (22.93 km)
Upper Ballinderry*
River Vartry, County Wicklow 20.5 miles (33.0 km)
Viceregal Stream, County Dublin
Wad River, County Dublin
Walkinstown Stream, County Dublin
Ward River, County Dublin
Ward River, Fingal
White River, County Limerick
White River, County Louth
Whitechurch Stream, County Dublin
Whitewater Brook, County Dublin
Wimbletown Stream, County Dublin
River Womanagh 19 miles (31 km)
River Woodford 18.5 miles (29.8 km)
Yellow River 17.25 miles (27.76 km)
TABLE 2
a The River Shannon's 209 m3/s is to Limerick City (Catchment area: 11,700 km2). If the discharges from all of the rivers and streams into the Shannon Estuary (including the rivers Feale 34.6m3/s, Maigue 15.6m3/s, Fergus 25.7m3/s, and Deel 7.4m3/s) are added to the discharge at Limerick giving a total catchment of 16,865 km2, the total discharge of the River Shannon at its mouth at Loop Head reaches 300 m3/s
b The River Bann's 92 m3/s is to Movanagher Gauging station (Basin area 5209.8 km2). The 102.5 m3/s is based on the total basin area of 5808 km2.
c The Three Sisters (Barrow, Nore & Suir) total flow into Waterford Harbour is 154 m3/s c The combined flow of the Barrow and Nore rivers is 86 m3/s before joining the river Suir near Waterford City.
