Rivers of Ireland

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 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 , 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 tidal estuary from its total length of , if one also excludes the lakes (L. Derg , L. Ree , L. Allen plus L. Boderg, L. Bofin, L. Forbes, L. Corry) from the Shannon's freshwater flow of , the Shannon as a freshwater river is only about 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 This is the longest stream flow (source to sea) within the Corrib Basin. == Largest Irish Rivers (by flow) ==

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 and the combined flow of the Barrow and Nore rivers is 86 m3/s before joining the river Suir near Waterford City. ==Rivers in Ulster==

With length in miles (and km) • River Crana • River Blackwater • River Callan • Oona Water • River Torrent • River Tall • River Blackwater (Northern) • River Main • Six Mile Water • Ballinderry River • Moyola River • Clady River • Knockoneil River • Grillagh River • Agivey River • Cusher River • Clady River • Altmore River • Cromore Burn • Devlin River • Cronaniv Burn • River Dun • River Bush • River Erne (See Atlantic rivers) • River Lagan • River Farset • Blackstaff River • River Quoile • Clanrye (Newry) River ==Rivers in the Republic of Ireland, flowing into the Irish Sea==

With length in miles (and km) • Castletown River • Cully Water • Kilcurry River • River Fane • River Glyde • River Dee, County Louth • River Boyne • River Owenroe (Moynalty) • River Blackwater, Kildare and Meath • River Blackwater, Cavan and Meath • Moynalty River • Athboy River • Stonestown River • Dale River • Kinnegad River • Yellow River • River Tolka • River Liffey • Kings River • Morell River • River Rye • Lyreen River • River Camac • River Poddle • River Dodder • Owendoher River • River Dargle • River Vartry • River Avoca (Ovoca) • River Avonmore • River Avonbeg • Aughrim River • River Slaney • Derreen River • River Derry • River Bann (Wexford) ==Rivers in the Republic of Ireland, flowing into the Celtic Sea==

With length in miles (and km) • River Barrow • Philipstown River • Figile River • River Slate • River Triogue • Finnery River • Tully Stream • River Greese • Burren River • River Nore • River Erkina • River Goul • River Dinan • Kings River • River Suir • River Drish • River Clodiagh • Aherlow River • River Ara • River Anner • John's River • River Tar • River Duag • River Colligan • River Mahon • River Blackwater, Cork • River Owentaraglen • River Allow • River Funshion • River Finisk • River Awbeg • River Dalua • River Bride • River Womanagh • Owenacurra River • Glashaboy River • River Lee • River Sullane • Shournagh River • River Bride • River Bandon • River Ilen • Argideen River • River Owenabue ==Rivers in the Republic of Ireland, flowing into the Atlantic Ocean==

With length in miles (and km) • Roughty River • Owenmore River (County Cavan) • Arigna River • Feorish River • River Brosna • Clodiagh River • Tullamore River • Silver River • Bunowen River • Little Brosna River • River Camcor • Ballyfinboy River • Nenagh River • Ollatrim River • River Inny • River Tang • River Suck • River Shiven • Boyle River (Total) • Boyle River • Lung River • Breedoge River • Camlin River • Mulkear River • Bilboa River • River Deel • River Maigue • River Fergus • River Corrib • Cregg River (via Lough Corrib) • River Clare (via Lough Corrib) • Grange River • Abbert River • River Black • Aille River (Connacht) • Baelanabrack River • River Robe (via Loughs Mask and Corrib) • River Clarin • Clady River • Cromore Burn • Cronaniv Burn • Kilcolgan River • Dooyertha River • Kinvarra River • River Doonbeg • River Inagh • Carrowbeg River • Bunowen River • River Erriff • Owenglin River • Ballynahinch River • Cashla River • Owenboliska River • Glenamoy River • Cloonaghmore River • Owenmore River (County Mayo) (incl. Carrowmore Lake) • Owenduff River • Newport River • River Moy • Deel River • Manulla River • Gweestion River • Owengarve River • River Glore • Easky River, County Sligo • Ballisodare River • Owenmore River (County Sligo) • Owenbeg River • Unshin River • River Garavogue (including L. Gill and Bonet River) • River Erne – mainly formed by Upper and Lower Lough Erne in County Fermanagh, Northern Ireland • River Annalee • River Cladagh (including Arney) • Sillees River • River Ballinamallard • River Swanlinbar • River Woodford • Dromore River • Yellow River • Colebrooke River • Finn River (County Fermanagh and County Monaghan) • Owenea River • Oily River • Bungosteen River • Ballintra River • River Eske • Drumenny Burn • River Gweebarra • River Swilly ==See also==