| Rank 2006 | Change since 2002 | Urban Area | County | Population 2006 | Increase since 2002 |
|---|---|---|---|---|---|
| 1 |  0 |
Dublin[a] & Suburbs | County Dublin | 1,045,769 | 4.1% |
| 2 | 0 |
Cork[a] & Suburbs | County Cork | 190,384 | 2.2% |
| 3 | 0 |
Limerick[a] & Suburbs | County Limerick & County Clare | 90,757 | 4.3% |
| 4 | 0 |
Galway[a] & Suburbs | County Galway | 72,729 | 9.9% |
| 5 | 0 |
Waterford & Suburbs | County Waterford & County Kilkenny | 49,213 | 5.3% |
| 6 |  1 |
Drogheda & Environs | County Louth & County Meath | 35,090 | 13.1% |
| 7 |  1 |
Dundalk[a] & Suburbs | County Louth | 35,085 | 7.9% |
| 8 | 1 |
Swords[a][b] | County Dublin | 33,998 | 25.1% |
| 9 | 1 |
Bray & Environs | County Wicklow & County Dublin | 31,901 | 3.1% |
| 10 | 4 |
Navan[a] & Environs | County Meath | 24,851 | 28.0% |
| 11 | 1 |
Ennis[a] & Environs | County Clare | 24,253 | 10.0% |
| 12 | 1 |
Tralee[a] & Environs | County Kerry | 22,744 | 3.4% |
| 13 | 1 |
Kilkenny[a] & Environs | County Kilkenny | 22,179 | 7.0% |
| 14 | 1 |
Carlow[a] & Environs | County Carlow & County Laois | 20,724 | 12.1% |
| 15 | 1 |
Naas[a] | County Kildare | 20,044 | 9.6% |
| 16 | 3 |
Sligo[a] & Environs | County Sligo | 19,402 | -1.7% |
| 17 | 2 |
Newbridge & Environs | County Kildare | 18,520 | 10.6% |
| 18 | 4 |
Mullingar[a] & Environs | County Westmeath | 18,416 | 17.9% |
| 19 | 2 |
Wexford[a] & Environs | County Wexford | 18,163 | 5.4% |
| 20 | 3 |
Letterkenny & Environs | County Donegal | 17,586 | 15.5% |
| 21 | 0 |
Athlone & Environs | County Westmeath & County Roscommon | 17,544 | 10.1% |
| 22 | 2 |
Celbridge | County Kildare | 17,262 | 7.8% |
| 23 | 5 |
Clonmel[a][c] & Environs | County Tipperary & County Waterford | 17,008 | 0.6% |
| 24 | 9 |
Balbriggan & Environs | County Dublin | 15,559 | 51.1% |
| 25 | 0 |
Malahide | County Dublin | 14,937 | 8.0% |
| 26 | 2 |
Leixlip | County Kildare | 14,676 | -2.3% |
| 27 | 0 |
Portlaoise[a] & Environs | County Laois | 14,613 | 20.5% |
| 28 | 2 |
Killarney & Environs | County Kerry | 14,603 | 11.2% |
| 29 | 1 |
Greystones & Environs | County Wicklow | 14,569 | 22.3% |
| 30 | 1 |
Tullamore[a] & Environs | County Offaly | 12,927 | 16.5% |
| 31 | 1 |
Carrigaline | County Cork | 12,835 | 14.7% |
| 32 | 3 |
Castlebar[a] & Environs | County Mayo | 11,891 | 4.6% |
| 33 | 2 |
Arklow & Environs | County Wicklow | 11,759 | 17.7% |
| 34 | 2 |
Cobh & Environs | County Cork | 11,303 | 15.2% |
| 35 | 1 |
Maynooth | County Kildare | 10,715 | 5.6% |
| 36 | 4 |
Ballina | County Mayo | 10,409 | 7.9% |
| 37 | 3 |
Mallow & Environs | County Cork | 10,241 | 14.6% |
| 38 | 1 |
Wicklow[a] & Environs | County Wicklow | 10,070 | 7.6% |
| 39 | 6 |
Midleton & Environs | County Cork | 10,048 | 26.3% |
| 40 | 4 |
Tramore & Environs | County Waterford | 9,634 | 16.0% |
| 41 | 2 |
Enniscorthy & Environs | County Wexford | 9,538 | 6.4% |
| 42 | 4 |
Skerries | County Dublin | 9,535 | 4.2% |
| 43 | 2 |
Shannon & Environs | County Clare | 9,222 | 7.7% |
| 44 | 1 |
Portmarnock | County Dublin | 8,979 | 7.2% |
| 45 | 16 |
Laytown-Bettystown-Mornington | County Meath | 8,978 | 60.4% |
| 46 | 0 |
Longford[a] & Environs | County Longford | 8,836 | 16.9% |
| 47 | 5 |
Ashbourne | County Meath | 8,528 | 34.0% |
| 48 | 1 |
Dungarvan[a] & Environs | County Waterford | 8,362 | 12.2% |
| 49 | 0 |
Rush | County Dublin | 8,286 | 22.4% |
| 50 | 5 |
Athy | County Kildare | 8,218 | 35.9% |
| 51 | 3 |
Cavan[a] & Environs | County Cavan | 7,883 | 29.3% |
| 52 | 0 |
Nenagh[a][c] & Environs | County Tipperary | 7,751 | 20.1% |
| 53 | 2 |
New Ross & Environs | County Wexford | 7,709 | 17.9% |
| 54 | 6 |
Thurles & Environs | County Tipperary | 7,682 | 3.5% |
| 55 | 4 |
Kildare | County Kildare | 7,538 | 32.4% |
| 56 | 27 |
Ratoath | County Meath | 7,249 | 91.1% |
| 57 | 7 |
Gorey & Environs | County Wexford | 7,193 | 36.2% |
| 58 | 2 |
Tuam & Environs | County Galway | 6,885 | 15.8% |
| 59 | 1 |
Trim & Environs | County Meath | 6,870 | 16.6% |
| 60 | 10 |
Youghal & Environs | County Cork | 6,785 | 2.8% |
| 61 | 4 |
Monaghan[a] & Environs | County Monaghan | 6,710 | 13.0% |
| 62 | 9 |
Ballinasloe & Environs | County Galway & County Roscommon | 6,303 | 1.4% |
| 63 | 15 |
Portarlington | County Laois & County Offaly | 6,004 | 50.1% |
| 64 | 1 |
Buncrana & Environs | County Donegal | 5,911 | 12.1% |
| 65 | 3 |
Carrick-on-Suir & Environs | County Tipperary & County Waterford | 5,906 | 5.7% |
| 66 | 5 |
Edenderry & Environs | County Offaly | 5,888 | 29.2% |
| 67 | 1 |
Fermoy & Environs | County Cork | 5,873 | 22.3% |
| 68 | 2 |
Bandon & Environs | County Cork | 5,822 | 12.8% |
| 69 | 6 |
Dunboyne | County Meath | 5,713 | 6.5% |
| 70 | 11 |
Donabate | County Dublin | 5,499 | 42.7% |
| 71 | 11 |
Westport & Environs | County Mayo | 5,475 | -2.8% |
| 72 | 2 |
Kells & Environs | County Meath | 5,248 | 18.7% |
| 73 | new |
Lusk | County Dublin | 5,236 | 113.2% |
| 74 | 5 |
Passage West & Environs | County Cork | 5,203 | 13.2% |
| 75 | 1 |
Newcastle West | County Limerick | 5,098 | 26.9% |
| 76 | 3 |
Birr & Environs | County Offaly & County Tipperary | 5,081 | 14.5% |
| 77 | 10 |
Tipperary & Environs | County Tipperary | 5,065 | 2.0% |
| 78 | 6 |
Roscommon[a] | County Roscommon | 5,017 | 11.8% |
| 79 | 4 |
Clane | County Kildare | 4,968 | 12.5% |
| 80 | 10 |
Roscrea | County Tipperary | 4,910 | 7.3% |
| 81 | 1 |
Ardee & Environs | County Louth | 4,694 | 18.9% |
| 82 | 5 |
Loughrea | County Galway | 4,532 | 13.2% |
| 83 | 1 |
Carrickmacross | County Monaghan | 4,387 | 14.5% |
| 84 | 5 |
Listowel | County Kerry | 4,338 | 8.5% |
| 85 | 0 |
Ballybofey-Stranorlar | County Donegal | 4,176 | 15.9% |
| 86 | 2 |
Clonakilty | County Cork | 4,154 | 12.3% |
| 87 | 9 |
Kilcock | County Kildare | 4,100 | 49.6% |
| 88 | 2 |
Kinsale | County Cork | 4,099 | 15.3% |
| 89 | 2 |
Mountmellick & Environs | County Laois | 4,069 | 20.1% |
| 90 | new |
Blessington | County Wicklow | 4,018 | 60.1% |
| 91 | 2 |
Sallins | County Kildare | 3,806 | 30.3% |
| 92 | new |
Kinsealy-Drinan | County Dublin | 3,651 | 73.0% |
| 93 | 1 |
Macroom & Environs | County Cork | 3,553 | 19.0% |
| 94 | new |
Oranmore | County Galway | 3,513 | 107.6% |
| 95 | 5 |
Dunshaughlin | County Meath | 3,384 | 10.5% |
| 96 | 1 |
Cahir | County Tipperary | 3,381 | 20.0% |
| 97 | 9 |
Mitchelstown | County Cork | 3,365 | 2.0% |
| 98 | 9 |
Bantry | County Cork | 3,309 | 5.0% |
| 99 | 5 |
Kilcoole | County Wicklow | 3,252 | 15.1% |
| 100 | new |
Duleek | County Meath | 3,236 | 48.9% |
Notes
edit- indicates this city or town is the county town of its respective county.
- Swords is the county town of Fingal, an administrative county within the traditional County Dublin.
- Clonmel and Nenagh are, respectively, the county towns of South Tipperary and North Tipperary, the two administrative counties within the traditional County Tipperary.