List of rivers of Ireland

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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 (in miles and kilometres) and their catchment areas (in km2). Table 2 shows the largest rivers in Ireland (by mean flow) in cubic meters per second.

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

List of the Longest Irish Rivers (with Basin areas)[edit]

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

River Length Basin Area
1 River Shannon (including estuary and lakes)a 360 km (224 mi) 16,800 km2[1]
2 River Barrowb 192 km (119 mi) 3,067 km2[1]
3 River Suirb 184 km (114.5 mi) 3,610 km2[1]
4 River Blackwater (Munster) 168 km (104.5 mi) 3,324 km2[1]
5 River Bann (including flow through L. Neagh)c 159 km (99 mi) 5,808 km2[2]
6 River Noreb 140 km (87 mi) 2,530 km2[1]
7 River Suck (Shannon) 133 km (83 mi) 1,600 km2[3]
8 River Liffey 132 km (82 mi) 1,256 km2[1]
9t River Erne 129 km (80 mi)[4] 4,372 km2[1]
9t River Foyle 129 km (80 mi) 2,925 km2[2]
11 River Slaney 117 km (73 mi) 1,762 km2[1]
12 River Boyne 113 km (70 mi) 2,695 km2[1]
13 River Moy 101 km (62.5 mi) 2,086 km2[1]
14 River Clare (Corrib)d 93 km (58 mi) 1,108 km2[5]
15 River Blackwater (Ulster) (Bann)c 92 km (57 mi) 1,507 km2[2]
16t River Inny (Shannon) 89 km (55.5 mi) 1.254 km2[3]
16t River Lee 89 km (55.5 mi) 1,253 km2[1]
18 River Lagan 86 km (53.5 mi) 565 km2[2]
19 River Brosna (Shannon) 79 km (49 mi) 1,248 km2[3]
20 River Laune (includes Lough Leane and River Flesk) 76 km (47.25 mi) 829 km2
21 River Feale (Shannon) 74 km (46 mi) 1,170 km2[6]
22 River Bandon 72 km (45 mi) 608 km2[1]
23 River Blackwater (Boyne) 68 km (42.5 mi) 733 km2[7]
24 River Annalee (Erne) 66.8 km (41.75 mi) 522 km2[7]
25t River Bride (M. Blackwater) 64 km (40 mi) 419 km2
25t Boyle River (Shannon) 64 km (40 mi)[8] 725 km2
27 River Deel (Shannon) 63.2 km (39.5 mi) 481 km2[7]
28t River Robe (Corrib)d 62.8 km (39.25 mi) 320 km2
28t River Finn (Foyle) 62.8 km (39.25 mi) 505 km2[7]
30 River Maigue (Shannon) 62 km (38.75 mi) 1,000 km2
31 Fane River, County Louth 61.2 km (38.25 mi) 350 km2
32 Ballisodare River 60.8 km (38 mi) 650 km2[2]
33 River Dee (Louth) 60.4 km (37.75 mi) 392 km2[7]
34 River Fergus (Shannon) 58.4 km (36.5 mi) 1,043 km2
35 Little Brosna River (Shannon) 57.6 km (36 mi) 662 km2
36t Mulkear River (including Bilboa River) (Shannon) 55.9 km (34.75 mi) 650 km2
36t River Glyde , County Louth 55.9 km (34.75 mi) 348 km2



  • The length of the River Shannon from the Shannon Pot to Limerick City is 160.5 miles (258 km)[9] with a basin area of 11,700 km2
  • The River Shannon's length using the Owenmore River (Glangevlin) as source is 231 miles (372 km)[10]
  • The River Shannon's length using the Boyle River's furthest source is 243.5 miles (392.1 km),[11] making this the longest natural stream flow (source to sea) in Ireland.
  • The River Shannon is a traditional freshwater river for just about 45% of its total length. Excluding the 63.5 mi tidal estuary from its total length of 224 mi, if one also excludes the lakes (L. Derg 24 mi, L. Ree 18 mi, L. Allen 7 mi[12] plus L. Boderg, L. Bofin, L. Forbes, L. Corry) from the Shannon's freshwater flow of 160.5 miles, the Shannon as a freshwater river is only about 100 miles long.


  • The total basin area of the Three Sisters (Barrow, Nore and Suir) is 9,207 km2.


  • 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).[13] This is the longest stream flow (source to sea) within the Bann/Neagh Basin.[14]


























List of the Largest Irish Rivers (by flow)[edit]


(River Basin)

Mean Discharge


1 River Shannon[1] 209*
2 River Corrib[1] 104
3 River Bann[19] 92
4 River Foyle[20] 90
5 River Blackwater (Munster)[1] 87
6 River Erne[1] 85
7 River Suir[1] 68**
8 River Moy[1] 63
9 River Barrow[1] 44**
10 River Laune[1] 43
11 River Nore[1] 42**
12 River Lee[1] 40
13 River Boyne[1] 38
14 River Cong[7] (Corrib) 37.6
15 River Slaney[1] 37
16 River Feale[21] (Shannon) 34.6
17 River Fergus[21] (Shannon) 25.7
18 River Clare[22] (Corrib) 22.9
19 River Suck[22] (Shannon) 22.2
20 River Bandon[1] 21.5
21 River Mourne[22] (Foyle) 21.1
22 River Blackwater (Ulster)[22] (Bann) 19.7
23 River Ballisodare[7] 18.25
24 River Inny[22] (Shannon) 18.4
25 River Avoca[1] 18
26 River Liffey[1] 17
27 River Derg[22] (Foyle) 16.2
28 River Maigue[21] (Shannon) 15.6
29 River Main[22] (Bann) 15.4
30 River Blackwater(Boyne)[7] (Boyne) 15.08
31 Owenmore River(Mayo)[22] 14.7
32 Boyle River[7] (Shannon) 13.57
33 River Deel[7] (Shannon) 12.56
34 Mulkear River[7] (Shannon) 12.55


  • The 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)[21][23] 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
    • The Three Sisters (Barrow, Nore & Suir) total flow into Waterford Harbour is 154 m3/s

See also[edit]


  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 Riverine Inputs and Direct Discharges to Convention Waters Annex V Statistical information on river catchment areas P. 70 [1]
  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 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 Notes on River Basins: Page 67
  5. ^ Western CFRAM Units of Management
  6. ^ Biology and Management of European Eel p.29
  7. ^ a b c d e f g h i j k
  8. ^ a b Notes on River Basins: Page 69
  9. ^ Ordnance Survey of Ireland: Rivers and their Catchment Basins 1958 (Table of Reference)
  10. ^ Shannon River Basin: Furthest sourceShannon River Basin#Furthest sources
  11. ^ Boyle River (Ireland)
  12. ^ Ask about Ireland
  13. ^ Ulster BlackwaterRiver Blackwater, Northern Ireland
  14. ^ a b European Commission Rivers Map
  15. ^ River Robe
  16. ^ Notes on River Basins: Page 64
  17. ^ Notes on River Basins: Page 68
  18. ^ Ordnance Survey (Ireland) Educational Facts
  19. ^ Riverine Inputs and Direct Discharges to Convention Waters Annex V Statistical information on river catchment areas P. 76 (Convert 1,000m³/d into m³/s)[2]
  20. ^
  21. ^ a b c d Long-term effects of hydropower installations and associated river regulation on River Shannon eel populations: mitigation and management [3]
  22. ^ 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
  23. ^ SFPC Maintenance Dredging Application: Table 3-7

External sources[edit]