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Rivers of Ireland

Shown here are all the major rivers and tributaries of Ireland with their lengths (in kilometres and miles). Starting with the Northern Ireland rivers, and going in a clockwise direction, the rivers (and tributaries) are listed in regard to their entry into the different seas: the Irish Sea, the Celtic Sea and the Atlantic Ocean. Also shown are two tables. Table 1 shows the longest rivers in Ireland with their lengths (in kilometres and miles), the counties they flow through, and their catchment areas (in square kilometres). Table 2 shows the largest rivers in Ireland (by mean flow) in cubic metres per second.

Some of the larger or better-known rivers of Ireland are shown on this map (large version).

The longest river in Ireland is the River Shannon, at 360.5 kilometres (224.0 mi). The river develops into three lakes along its course, Lough Allen, Lough Ree and Lough Derg. Of these, Lough Derg is the largest. The Shannon enters the Atlantic Ocean at the Shannon Estuary. Other major rivers include the River Liffey, River Lee, River Swilly, River Foyle, River Lagan, River Erne, River Blackwater, River Nore, River Suir, River Barrow (The Three Sisters), River Bann, River Slaney, River Boyne, River Moy and River Corrib.

Longest Irish Rivers (with Basin areas)

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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

RiverCountiesLengthBasin Area
1River Shannon (including estuary and flow through lakes)aCavan, Leitrim, Roscommon, Longford, Westmeath, Galway, Offaly,

Tipperary, Clare, Limerick, Kerry

360 km (224 mi)16,800 km2[1]
2River BarrowbLaois, Kildare, Kilkenny, Carlow,

Wexford, Waterford

192 km (119 mi)3,067 km2[1]
3River SuirbTipperary, Waterford, Kilkenny, Wexford184 km (114.5 mi)3,610 km2[1]
4River Blackwater (Munster)Kerry, Cork, Waterford168 km (104.5 mi)3,324 km2[1]
5River Bann (including flow through L. Neagh)cDown, Armagh, Antrim, Londonderry159 km (99 mi)5,808 km2[2]
6River NorebTipperary, Laois, Kilkenny140 km (87 mi)2,530 km2[1]
7River Suck (Shannon)Roscommon, Galway133 km (83 mi)1,600 km2[3]
8River LiffeyWicklow, Kildare, Dublin132 km (82 mi)1,256 km2[1]
9River ErneCavan, Fermanagh, Donegal129 km (80 mi)[4]4,372 km2[1]
10River Foyle (including Rivers Mourne, Strule & Camowen)Tyrone, Londonderry, Donegal129 km (80 mi)2,925 km2[2]
11River SlaneyWicklow, Carlow, Wexford117 km (73 mi)1,762 km2[1]
12River BoyneKildare, Offaly, Meath, Louth113 km (70 mi)2,695 km2[1]
13River MoySligo, Mayo101 km (62.5 mi)2,086 km2[1]
14River Clare (Corrib)dMayo, Roscommon, Galway93 km (58 mi)1,108 km2[5]
15River Blackwater (Ulster) (Bann) cTyrone, Monaghan, Armagh92 km (57 mi)1,507 km2[2]
16tRiver Inny (Shannon)Cavan, Longford, Westmeath89 km (55.5 mi)1,254 km2[3]
16tRiver LeeCork89 km (55.5 mi)1,253 km2[1]
18River LaganDown, Antrim86 km (53.5 mi)565 km2[2]
19River Brosna (Shannon)Westmeath, Offaly79 km (49 mi)1,248 km2[3]
20River Laune (includes Lough Leane and River Flesk)Kerry76 km (47.25 mi)829 km2
21River Feale (Shannon)Cork, Limerick, Kerry74 km (46 mi)1,170 km2[6]
22River BandonCork72 km (45 mi)608 km2[1]
23River Blackwater (Boyne)Cavan, Meath68 km (42.5 mi)733 km2[7]
24River Annalee (Erne)Monaghan, Cavan66.8 km (41.75 mi)522 km2[7]
25River Bride (M. Blackwater)Cork, Waterford64 km (40 mi)419 km2
26Boyle River (including Lung River) (Shannon)Mayo, Sligo, Roscommon64 km (40 mi)[4]725 km2
27River Deel (Shannon)Cork, Limerick63.2 km (39.5 mi)481 km2[7]
28River Robe (Corrib)dMayo62.8 km (39.25 mi)320 km2
29River Finn (County Donegal) (Foyle)Donegal, Tyrone62.8 km (39.25 mi)505 km2[7]
30River Maigue (Shannon)Cork, Limerick62 km (38.75 mi)1,000 km2
31Fane RiverMonaghan, Armagh, Louth61.2 km (38.25 mi)350 km2
32Ballisodare RiverSligo60.8 km (38 mi)650 km2[2]
33River Dee (Louth)Cavan, Meath, Louth60.4 km (37.75 mi)392 km2[7]
34River Fergus (Shannon)Clare58.4 km (36.5 mi)1,043 km2
35Little Brosna River (Shannon)Offaly, Tipperary57.6 km (36 mi)662 km2
36Mulkear River (including Bilboa River) (Shannon)Tipperary, Limerick55.9 km (34.75 mi)650 km2
37River Glyde (Co. Louth)Cavan, Meath, Louth55.9 km (34.75 mi)348 km2

TABLE 1

a

  • The length of the River Shannon from the Shannon Pot to Limerick City is 258 kilometres (160 mi)[8] with a basin area of 11,700 km2.
  • The River Shannon's overall length (to Loop Head), using the Owenmore River (County Cavan) as source, is 372 kilometres (231 mi),[9] 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),[10] 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)[11] 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),[12] surpassed, in Ireland, only by the Shannon and Barrow rivers. This is the longest stream flow (source to sea) in Ulster.[13]

d

Largest Irish Rivers (by flow)

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River

(River Basin)

Mean Discharge

(m3/s)

1River Shannon[1]a209 (300)
2River Corrib[1]105.5
3River Bann[15]b92 (102.5)
4River Foyle[16]90
5River Blackwater (Munster)[1]87.5
6River Erne[1]85
7River Suir[1]c76
8River Moy[1]63
9River Barrow[1]c46.5
10River Laune[1]43
11River Nore[1]c42
12River Lee[1]40
13River Slaney[1]39
14River Boyne[1]38.5
15River Cong[7] (Corrib)37.6
16River Feale[17] (Shannon)34.6
17River Fergus[17] (Shannon)25.7
18River Clare[18] (Corrib)22.9
19River Suck[18] (Shannon)22.2
20River Avoca[1]22
21River Bandon[1]21.5
22River Mourne[18] (Foyle)21.1
23River Blackwater (Ulster)[18] (Bann)19.7
24River Ballisodare[7]18.25
25River Inny[18] (Shannon)18.4
26River Liffey[1]17
27River Derg[18] (Foyle)16.2
28River Maigue[17] (Shannon)15.6
29River Main[18] (Bann)15.4
30River Blackwater (Boyne)[7] (Boyne)15.08
31Aille River (Connacht)[19] (Corrib)15.0
32Owenmore River (County Mayo)[18]14.7
33Boyle River[7] (Shannon)13.57
34River Deel[7] (Shannon)12.56
35Mulkear River[7] (Shannon)12.55

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)[17][20] 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).[21] The 102.5 m3/s is based on the total basin area of 5808 km2[2].

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

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With length in miles (and km)

Rivers in the Republic of Ireland, flowing into the Irish Sea

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With length in miles (and km)

River Dodder

Rivers in the Republic of Ireland, flowing into the Celtic Sea

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With length in miles (and km)

River Goul
River Lee

Rivers in the Republic of Ireland, flowing into the Atlantic Ocean

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With length in miles (and km)

River Shannon
River Annalee

See also

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References

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  1. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab Comprehensive study of Riverine Inputs Details of hydrometric stations, sampling stations Page 17, Table 2 [1] Archived 2017-08-05 at the Wayback Machine
  2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj dk dl dm dn do dp dq dr ds dt du dv dw dx dy dz ea eb ec ed ee ef eg eh ei ej ek el em en eo ep eq er es et eu ev ew ex ey ez fa fb fc fd fe ff fg fh fi fj fk fl fm fn fo fp fq fr fs ft fu fv fw fx fy fz ga gb gc gd ge gf gg gh gi gj gk gl gm gn go gp gq gr gs gt gu gv gw gx Ordnance Survey of Ireland: Rivers and their Catchment Basins 1958 (Table of Reference)
  3. ^ a b c Dublin Marine Institute 1998: Studies of Irish Rivers and Lakes: Moriarty, Christopher
  4. ^ a b c d e f g Robert A. Williams (27 May 1872). "Notes on river basins" – via Internet Archive.
  5. ^ "Western CFRAM Units of Management" (PDF). Archived (PDF) from the original on 2 November 2014. Retrieved 30 October 2014.
  6. ^ "Biology and Management of European Eel p.29" (PDF). wordpress.com. Archived (PDF) from the original on 7 September 2014. Retrieved 30 October 2014.
  7. ^ a b c d e f g h i j k "Irish Hydro Power Association". Archived from the original on 5 November 2014. Retrieved 9 November 2014.
  8. ^ a b "Secondary Schools Teacher Resources – Ordnance Survey Ireland". osi.ie. Archived from the original on 27 March 2015. Retrieved 27 May 2018.
  9. ^ Shannon River Basin: Furthest sourceShannon River Basin#Furthest sources[circular reference]
  10. ^ Boyle River (Ireland)[circular reference]
  11. ^ "Home". askaboutireland.ie. Archived from the original on 10 January 2020. Retrieved 24 September 2021.
  12. ^ Ulster BlackwaterRiver Blackwater, Northern Ireland[circular reference]
  13. ^ a b "European Commission Rivers Map" (PDF). Archived (PDF) from the original on 19 August 2015. Retrieved 16 November 2014.
  14. ^ River Robe[circular reference]
  15. ^ "- National River Flow Archive". ceh.ac.uk. Archived from the original on 4 March 2016. Retrieved 15 January 2016.
  16. ^ "SMILE – Sustainable Mariculture in northern Irish Lough Ecosystems". ecowin.org. Archived from the original on 12 November 2013. Retrieved 19 October 2014.
  17. ^ a b c d Long-term effects of hydropower installations and associated river regulation on River Shannon eel populations: mitigation and management [2] Archived 2016-03-04 at the Wayback Machine
  18. ^ a b c d e f g h Royal Irish Academy, Atlas of Ireland (Royal Irish Academy, Dublin, 1979) Hydrology P. 23 – Rivers: Mean Discharge
  19. ^ "OPW". Archived from the original on 24 September 2015. Retrieved 20 June 2014.
  20. ^ "Department of Housing, Planning and Local Government". Department of Housing, Planning and Local Government. Archived from the original on 27 May 2018. Retrieved 27 May 2018.
  21. ^ "Search for gauging stations". ceh.ac.uk. 5 October 2015. Archived from the original on 28 January 2016. Retrieved 15 January 2016.
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