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Ireland's rivers and loughs

The main rivers by length and the largest loughs by area, with the counties they run through and their names in Irish.

Rivers — 37
RiverIn IrishLength (km)Catchment (km²)Counties
River Shannon An tSionainn 360 16,800 Cavan, Clare, Galway, Kerry, Leitrim, Limerick, Longford, Offaly, Roscommon, Tipperary, Westmeath
River Barrow An Bhearú 192 3,067 Carlow, Kildare, Kilkenny, Laois, Waterford, Wexford
River Suir An tSiúir 184 3,610 Kilkenny, Tipperary, Waterford, Wexford
River Blackwater An Abhainn Mhór 168 3,324 Cork, Kerry, Waterford
River Bann An Bhanna 159 5,808 Antrim, Armagh, Down, Derry / Londonderry
River Nore An Fheoir 140 2,530 Kilkenny, Laois, Tipperary
River Suck An tSuca 133 1,600 Galway, Roscommon
River Liffey An Life 132 1,256 Dublin, Kildare, Wicklow
River Erne An Éirne 129 4,372 Cavan, Donegal, Fermanagh
River Foyle An Feabhal 129 2,925 Donegal, Derry / Londonderry, Tyrone
River Slaney An tSláine 117 1,762 Carlow, Wexford, Wicklow
River Boyne An Bhóinn 113 2,695 Kildare, Louth, Meath, Offaly
River Moy An Mhuaidh 101 2,086 Mayo, Sligo
River Clare Abhainn an Chláir 93 1,108 Galway, Mayo, Roscommon
River Blackwater — 92 1,507 Armagh, Monaghan, Tyrone
River Inny — 89 1,254 Cavan, Longford, Westmeath
River Lee An Laoi 89 1,253 Cork
River Lagan Abhainn an Lagáin 86 565 Antrim, Down
River Brosna An Bhrosnach 79 1,248 Offaly, Westmeath
River Laune An Leamhain 76 829 Kerry
River Feale An Fhéil 74 1,170 Cork, Kerry, Limerick
River Bandon Abhainn na Bandan 72 608 Cork
River Blackwater — 68 733 Cavan, Meath
River Annalee Abhainn na hEoghancha 66.8 522 Cavan, Monaghan
River Bride An Bhríd 64 419 Cork, Waterford
Boyle River An Bhúill 64 725 Mayo, Roscommon, Sligo
River Deel — 63.2 481 Cork, Limerick
River Robe — 62.8 320 Mayo
River Finn — 62.8 505 Donegal, Tyrone
River Maigue An Mháigh 62 1,000 Cork, Limerick
Fane River — 61.2 350 Armagh, Louth, Monaghan
Ballisodare River — 60.8 650 Sligo
River Dee — 60.4 392 Cavan, Louth, Meath
River Fergus An Forghas 58.4 1,043 Clare
Little Brosna River An Bhrosnach Bheag 57.6 662 Offaly, Tipperary
Mulkear River An Mhaoilchearn 55.9 650 Limerick, Tipperary
River Glyde An Casán 55.9 348 Cavan, Louth, Meath
Loughs — 14
LoughIn IrishArea (km²)Max depth (m)Counties
Lough Neagh Loch nEathach 396 25 Antrim, Armagh, Down, Derry / Londonderry, Tyrone
Lough Corrib Loch Coirib 176 50.9 Galway, Mayo
Lough Derg Loch Deirgeirt 130 36 Clare, Galway, Tipperary
Lower Lough Erne Loch Éirne 109 69 Fermanagh
Lough Ree Loch Rí 105 35 Longford, Roscommon, Westmeath
Lough Mask Loch Measca 83 58 Galway, Mayo
Lough Conn Loch Con 50 34 Mayo
Lough Allen Loch Aillionn 35 42.7 Leitrim, Roscommon
Upper Lough Erne Loch Éirne 34 27 Fermanagh
Lough Melvin Loch Meilbhe 23 44 Fermanagh, Leitrim
Lough Leane Loch Léin 20 60 Kerry
Poulaphouca Reservoir Poll an Phúca 20 — Wicklow
Lough Sheelin Loch Síleann 19 15 Cavan, Meath, Westmeath
Lough Carra Loch Ceara 16 18 Mayo
Quick answers
What is the longest river in Ireland?

The River Shannon, 360 km including its estuary and the lakes it flows through, draining 16,800 km² across 11 counties. The River Barrow (192 km) and the River Suir (184 km) come next.

What is the largest lake in Ireland?

Lough Neagh, at 396 km², touching 5 counties; Lough Corrib (176 km²) is the largest in the Republic.

Sources

Wikipedia's List of rivers of Ireland ↗ (lengths and catchments, citing EPA and OSPAR data) and List of loughs of Ireland ↗ (Ordnance Survey Ireland data). Irish names from Wikidata, linked to Logainm.ie where it holds the record.

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