Republic of Ireland surname ranking
This ranking reports the thousand most present surnames in the Republic of Ireland. You can see the rank position, the surname and the number of families that have it.
Ranking
| Rank | Surname | Families |
| Previous hundred | Previous hundred | Previous hundred |
| 101 | O'DRISCOLL | 919 |
| 102 | O'ROURKE | 910 |
| 103 | HENNESSY | 887 |
| 104 | DUGGAN | 886 |
| 105 | DEMPSEY | 875 |
| 106 | KELLEHER | 875 |
| 107 | PHELAN | 875 |
| 108 | MOONEY | 868 |
| 109 | CONWAY | 860 |
| 110 | CAREY | 859 |
| 111 | O'DWYER | 856 |
| 112 | DOWLING | 854 |
| 113 | FOX | 848 |
| 114 | MCDONAGH | 847 |
| 115 | JOYCE | 843 |
| 116 | DONNELLY | 836 |
| 117 | JONES | 835 |
| 118 | MCDERMOTT | 833 |
| 119 | MALONE | 826 |
| 120 | O'TOOLE | 821 |
| 121 | CAMPBELL | 814 |
| 122 | DOLAN | 810 |
| 123 | LAWLOR | 802 |
| 124 | HURLEY | 790 |
| 125 | MCHUGH | 786 |
| 126 | MCCABE | 785 |
| 127 | COUGHLAN | 776 |
| 128 | CLEARY | 766 |
| 129 | O'RIORDAN | 756 |
| 130 | COLEMAN | 749 |
| 131 | GLEESON | 748 |
| 132 | LEE | 739 |
| 133 | MCDONALD | 737 |
| 134 | REYNOLDS | 737 |
| 135 | KEATING | 718 |
| 136 | O'REGAN | 716 |
| 137 | CONROY | 711 |
| 138 | REDMOND | 710 |
| 139 | CLANCY | 704 |
| 140 | FORDE | 703 |
| 141 | CUMMINS | 702 |
| 142 | FLEMING | 698 |
| 143 | KINSELLA | 696 |
| 144 | O'GRADY | 694 |
| 145 | LEAHY | 693 |
| 146 | FINN | 692 |
| 147 | MAHON | 690 |
| 148 | LONG | 689 |
| 149 | DILLON | 683 |
| 150 | BREEN | 682 |
| 151 | MORRISSEY | 682 |
| 152 | HEGARTY | 678 |
| 153 | O'MALLEY | 674 |
| 154 | HARRINGTON | 673 |
| 155 | ROONEY | 673 |
| 156 | WILLIAMS | 669 |
| 157 | TOBIN | 659 |
| 158 | LEONARD | 656 |
| 159 | BOURKE | 648 |
| 160 | MADDEN | 646 |
| 161 | MEEHAN | 642 |
| 162 | COFFEY | 638 |
| 163 | GREENE | 637 |
| 164 | CASSIDY | 632 |
| 165 | MCLAUGHLIN | 630 |
| 166 | COYLE | 628 |
| 167 | WILSON | 624 |
| 168 | COONEY | 621 |
| 169 | HEFFERNAN | 620 |
| 170 | JOHNSON | 619 |
| 171 | JORDAN | 616 |
| 172 | MULLIGAN | 616 |
| 173 | FAHY | 614 |
| 174 | GALVIN | 611 |
| 175 | O'GORMAN | 611 |
| 176 | HYNES | 609 |
| 177 | OBRIEN | 608 |
| 178 | FINNEGAN | 603 |
| 179 | MORRIS | 600 |
| 180 | KIELY | 593 |
| 181 | TWOMEY | 587 |
| 182 | DORAN | 582 |
| 183 | GERAGHTY | 580 |
| 184 | MORGAN | 571 |
| 185 | ALLEN | 569 |
| 186 | WOODS | 566 |
| 187 | LARKIN | 564 |
| 188 | SULLIVAN | 564 |
| 189 | MONAGHAN | 559 |
| 190 | COTTER | 555 |
| 191 | CARR | 553 |
| 192 | CONLON | 550 |
| 193 | MCGUINNESS | 548 |
| 194 | KEENAN | 544 |
| 195 | CALLAGHAN | 542 |
| 196 | KIRWAN | 542 |
| 197 | OCONNOR | 542 |
| 198 | MCEVOY | 541 |
| 199 | RUSSELL | 540 |
| 200 | MCCANN | 537 |
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