| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Hackballs Cross | city | Lu | Ireland | 54.03 | -6.51 | 193 | 3818 |
| Hacketstown | city | Carlow | Ireland | 52.86 | -6.56 | 830 | 1901 |
| Hacketstown | city | Ireland | 52.24 | -7.33 | 830 | 1957 | |
| Hackett's Cross | city | Lu | Ireland | 53.80 | -6.26 | 3 | 1874 |
| Hacketts Hill | city | Laois | Ireland | 52.87 | -7.13 | 830 | 2079 |
| Hackett’s Cross | city | Lu | Ireland | 53.80 | -6.26 | 3 | 1874 |
| Hackstown Bridge | city | Ireland | 52.90 | -8.13 | 396 | 2301 | |
| Hagansgate Cross Roads | city | Wexford | Ireland | 52.25 | -6.90 | 104 | 2312 |
| Haggard | city | Wexford | Ireland | 52.18 | -6.88 | 3 | 1427 |
| Haggard | city | Kilkenny | Ireland | 52.35 | -7.08 | 830 | 1554 |
| Haggard Bridge | city | Wexford | Ireland | 52.24 | -6.88 | 68 | 2375 |
| Halfway | city | Cork | Ireland | 51.81 | -8.58 | 196 | 6183 |
| Halls | city | Leitrim | Ireland | 53.99 | -7.81 | 249 | 1309 |
| Halltown | city | Meath | Ireland | 53.63 | -6.77 | 246 | 3942 |
| Hamilton's Bridge | city | Kildare | Ireland | 53.30 | -6.93 | 242 | 2535 |
| Hamilton’s Bridge | city | Kildare | Ireland | 53.30 | -6.93 | 242 | 2535 |
| Hanlonstown | city | Meath | Ireland | 53.63 | -6.72 | 190 | 12562 |
| Hansfield | city | Fingal | Ireland | 53.40 | -6.43 | 183 | 61707 |
| Haremount | city | Kerry | Ireland | 52.15 | -9.40 | 830 | 1699 |
| Haremount | city | Cork | Ireland | 51.83 | -9.09 | 830 | 1136 |
| Harlinstown | city | Meath | Ireland | 53.72 | -6.58 | 101 | 2489 |
| Harmanstown | city | Meath | Ireland | 53.70 | -6.62 | 118 | 7366 |
| Harney's Cross Roads | city | Ireland | 52.33 | -7.62 | 1010 | 2184 | |
| Harney’s Cross Roads | city | Ireland | 52.33 | -7.62 | 1010 | 2184 | |
| Harold's Cross | city | Dublin | Ireland | 53.33 | -6.29 | 124 | 333402 |
| Haroldstown | city | Carlow | Ireland | 52.85 | -6.66 | 387 | 1857 |
| Harold’s Cross | city | Dublin | Ireland | 53.33 | -6.29 | 124 | 333402 |
| Harpers Town | city | Donegal | Ireland | 54.77 | -7.66 | 406 | 2400 |
| Harristown | city | Laois | Ireland | 52.83 | -7.62 | 830 | 2038 |
| Harristown | city | Ireland | 52.18 | -7.01 | 150 | 3127 | |
| Harristown | city | Wexford | Ireland | 52.35 | -6.64 | 193 | 2553 |
| Harristown | city | Kilkenny | Ireland | 52.41 | -7.24 | 830 | 1533 |
| Harristown | city | Kildare | Ireland | 53.14 | -6.67 | 410 | 3926 |
| Harristown | city | Meath | Ireland | 53.66 | -6.62 | 288 | 11156 |
| Harristown Cross Roads | city | Laois | Ireland | 52.84 | -7.61 | 830 | 2151 |
| Harrylock | city | Wexford | Ireland | 52.16 | -6.89 | 3 | 839 |
| Hartley Bridge | city | Kildare | Ireland | 53.32 | -6.96 | 236 | 1899 |
| Hartstown | city | Wicklow | Ireland | 52.97 | -6.73 | 830 | 2649 |
| Hartstown | city | Fingal | Ireland | 53.39 | -6.43 | 154 | 79289 |
| Hartstown | city | Meath | Ireland | 53.68 | -7.02 | 364 | 1485 |
| Haughtons Bridge | city | Wicklow | Ireland | 52.87 | -6.06 | 0 | 832 |
| Hawarden Bridge | city | Ireland | 52.56 | -8.12 | 830 | 1739 | |
| Hawkshaws Bridge | city | Wexford | Ireland | 52.32 | -6.70 | 134 | 2094 |
| Hawkstown | city | Wicklow | Ireland | 52.97 | -6.09 | 246 | 9469 |
| Hawkswood | city | Offaly | Ireland | 53.22 | -7.48 | 308 | 7624 |
| Hawthorn Hill | city | Cork | Ireland | 51.77 | -8.62 | 249 | 2637 |
| Hayes Bridge | city | Cork | Ireland | 51.67 | -8.75 | 134 | 2987 |
| Hayes Cross Roads | city | Cork | Ireland | 51.59 | -8.95 | 249 | 2888 |
| Hayfield | city | Cork | Ireland | 51.93 | -8.75 | 351 | 3193 |
| Headford | city | Galway | Ireland | 53.47 | -9.10 | 137 | 2706 |
| Headley Bridge | city | Kerry | Ireland | 52.32 | -9.36 | 830 | 1479 |
| Heamount | city | Cork | Ireland | 51.93 | -8.23 | 252 | 6681 |
| Heatheryhill | city | Donegal | Ireland | 54.92 | -7.55 | 987 | 2290 |
| Heathfield | city | Cork | Ireland | 51.76 | -8.54 | 259 | 3634 |
| Heathlawn | city | Mayo | Ireland | 53.79 | -9.08 | 830 | 1665 |
| Heathtown Cross Roads | city | Meath | Ireland | 53.61 | -6.34 | 830 | 3331 |
| Heavenstown | city | Wexford | Ireland | 52.26 | -6.58 | 101 | 2684 |
| Hedgetown | city | Galway | Ireland | 53.24 | -8.55 | 239 | 5336 |
| Heigh | city | Ireland | 52.74 | -8.00 | 830 | 1782 | |
| Heirhill | city | Kerry | Ireland | 52.42 | -9.81 | 226 | 2195 |
| Helen Park | city | Ireland | 52.57 | -7.70 | 830 | 2139 | |
| Hell Bridge | city | Clare | Ireland | 52.84 | -8.83 | 170 | 1726 |
| Hemming's Ville | city | Galway | Ireland | 53.21 | -8.03 | 180 | 1583 |
| Hemming’s Ville | city | Galway | Ireland | 53.21 | -8.03 | 180 | 1583 |
| Hempstown | city | Wicklow | Ireland | 53.20 | -6.50 | 895 | 5146 |
| Henley's Bridge | city | Cork | Ireland | 51.91 | -8.58 | 209 | 23942 |
| Henley’s Bridge | city | Cork | Ireland | 51.91 | -8.58 | 209 | 23942 |
| Henry Bridge | city | Kildare | Ireland | 53.30 | -6.59 | 229 | 12611 |
| Herbertstown | city | Ireland | 52.52 | -8.47 | 242 | 2311 | |
| Herbertstown | city | Meath | Ireland | 53.69 | -7.11 | 830 | 1100 |
| Herbertstown | city | Meath | Ireland | 53.65 | -6.82 | 252 | 2243 |
| Hermitage | city | Wexford | Ireland | 52.30 | -6.45 | 3 | 17403 |
| Hermitage | city | Ireland | 52.70 | -8.53 | 137 | 8009 | |
| Hernsbrook | city | Ireland | 52.35 | -9.03 | 830 | 1349 | |
| Higginstown | city | Kilkenny | Ireland | 52.67 | -7.19 | 249 | 10567 |
| Higginstown | city | An Iarmhi | Ireland | 53.53 | -7.14 | 830 | 2204 |
| Higginstown | city | Meath | Ireland | 53.60 | -6.95 | 308 | 2966 |
| High Street | city | Ireland | 53.03 | -8.07 | 252 | 1084 | |
| High Town | city | Donegal | Ireland | 54.80 | -7.64 | 127 | 3030 |
| Highfield | city | Cork | Ireland | 51.52 | -9.34 | 249 | 1872 |
| Highrath | city | Kilkenny | Ireland | 52.64 | -7.18 | 206 | 6638 |
| Highrath | city | Kilkenny | Ireland | 52.55 | -7.35 | 223 | 2760 |
| Highstreet | city | Offaly | Ireland | 53.25 | -7.94 | 187 | 1319 |
| Hightown | city | Cork | Ireland | 52.03 | -8.28 | 830 | 1621 |
| Highwood | city | Sligo | Ireland | 54.07 | -8.28 | 301 | 858 |
| Hill Head | city | Donegal | Ireland | 55.12 | -7.43 | 255 | 7146 |
| Hill House | city | Offaly | Ireland | 53.22 | -7.85 | 239 | 1890 |
| Hill Street | city | Roscommon | Ireland | 53.88 | -8.08 | 232 | 1288 |
| Hill Town | city | Donegal | Ireland | 54.68 | -8.33 | 830 | 1500 |
| Hill View | city | Kildare | Ireland | 52.97 | -6.81 | 830 | 1772 |
| Hillbrook | city | Wicklow | Ireland | 52.75 | -6.46 | 830 | 1975 |
| Hillside | city | Wexford | Ireland | 52.19 | -6.82 | 0 | 1085 |
| Hilltown | city | Wexford | Ireland | 52.27 | -6.71 | 59 | 2358 |
| Hilltown | city | Wexford | Ireland | 52.19 | -6.41 | 3 | 1570 |
| Hilltown | city | Wexford | Ireland | 52.23 | -6.46 | 16 | 2322 |
| Hillville | city | Kerry | Ireland | 52.11 | -9.77 | 19 | 4927 |
| Hiskinstown | city | An Iarmhi | Ireland | 53.58 | -7.13 | 400 | 1758 |
| Hodgestown | city | Kildare | Ireland | 53.32 | -6.82 | 298 | 3187 |
| Hodgestown | city | An Iarmhi | Ireland | 53.53 | -7.15 | 830 | 2256 |
| Hogan's Bridge | city | Clare | Ireland | 52.85 | -9.38 | 249 | 2544 |
| Hogane's Bridge | city | Ireland | 52.62 | -8.97 | 16 | 2333 | |
| Hogane’s Bridge | city | Ireland | 52.62 | -8.97 | 16 | 2333 | |
| Hogan’s Bridge | city | Clare | Ireland | 52.85 | -9.38 | 249 | 2544 |
| Hollowpark | city | Mayo | Ireland | 53.78 | -9.17 | 177 | 1650 |
| Holly Park | city | Laois | Ireland | 52.87 | -7.10 | 830 | 1822 |
| Hollyford | city | Ireland | 52.63 | -8.11 | 997 | 1235 | |
| Hollyfort | city | Wexford | Ireland | 52.72 | -6.34 | 830 | 2784 |
| Hollymount | city | Mayo | Ireland | 53.65 | -9.12 | 187 | 1317 |
| Hollymount | city | Cork | Ireland | 52.12 | -8.30 | 830 | 6646 |
| Hollymount | city | Galway | Ireland | 53.09 | -8.71 | 265 | 684 |
| Hollypark | city | Ireland | 52.61 | -8.89 | 68 | 2366 | |
| Hollywood | city | Wicklow | Ireland | 53.09 | -6.61 | 915 | 2735 |
| Hollywood | city | Kerry | Ireland | 51.83 | -9.90 | 114 | 445 |
| Holme | city | Donegal | Ireland | 55.15 | -7.72 | 393 | 1407 |
| Holmes's Town | city | Donegal | Ireland | 54.82 | -7.63 | 295 | 3561 |
| Holmestown | city | Wexford | Ireland | 52.35 | -6.58 | 177 | 3092 |
| Holmes’s Town | city | Donegal | Ireland | 54.82 | -7.63 | 295 | 3561 |
| Holy's Cross Roads | city | Cork | Ireland | 52.18 | -8.77 | 341 | 1659 |
| Holycross | city | Ireland | 52.64 | -7.86 | 291 | 3612 | |
| Holycross | city | Ireland | 52.51 | -8.54 | 278 | 2695 | |
| Holy’s Cross Roads | city | Cork | Ireland | 52.18 | -8.77 | 341 | 1659 |
| Hoodsgrove | city | Kilkenny | Ireland | 52.41 | -7.00 | 209 | 2767 |
| Hooper's Cross Roads | city | Carlow | Ireland | 52.73 | -6.90 | 830 | 3070 |
| Hooper’s Cross Roads | city | Carlow | Ireland | 52.73 | -6.90 | 830 | 3070 |
| Hores Mead Bridge | city | Wexford | Ireland | 52.30 | -6.74 | 68 | 2125 |
| Horetown | city | Wexford | Ireland | 52.24 | -6.44 | 13 | 3219 |
| Horistown | city | Meath | Ireland | 53.75 | -6.62 | 830 | 2042 |
| Horse and Jockey | city | Ireland | 52.62 | -7.78 | 830 | 2384 | |
| Horsehead | city | Cork | Ireland | 51.88 | -8.34 | 16 | 24381 |
| Horseleap | city | Galway | Ireland | 53.47 | -8.67 | 403 | 1873 |
| Horseleap Cross Roads | city | Galway | Ireland | 53.47 | -8.67 | 403 | 1873 |
| Hortland | city | Kildare | Ireland | 53.38 | -6.79 | 291 | 2112 |
| Hospital | city | Ireland | 52.47 | -8.43 | 255 | 2721 | |
| Hospital Land | city | Meath | Ireland | 53.63 | -6.92 | 269 | 3311 |
| Hough | city | Ireland | 52.63 | -7.93 | 249 | 1695 | |
| Howardstown | city | Ireland | 52.44 | -8.70 | 216 | 1987 | |
| Howlan's Cross Roads | city | Wexford | Ireland | 52.31 | -6.67 | 196 | 2372 |
| Howlan’s Cross Roads | city | Wexford | Ireland | 52.31 | -6.67 | 196 | 2372 |
| Howth | city | Fingal | Ireland | 53.39 | -6.07 | 3 | 9284 |
| Huband Bridge | city | Kildare | Ireland | 53.27 | -6.86 | 318 | 3950 |
| Hugginstown | city | Kilkenny | Ireland | 52.45 | -7.25 | 830 | 1663 |
| Hughstown | city | Kildare | Ireland | 52.94 | -6.76 | 830 | 2103 |
| Hunting Hill | city | Cork | Ireland | 52.19 | -8.50 | 255 | 1528 |
| Huntington | city | Laois | Ireland | 53.13 | -7.17 | 324 | 5893 |
| Hunts Grove | city | Ireland | 52.76 | -8.08 | 958 | 948 | |
| Hurdlestown | city | Meath | Ireland | 53.70 | -6.81 | 203 | 2758 |
| Hurlers Cross | city | Clare | Ireland | 52.72 | -8.83 | 3 | 5537 |
| Hyinenstown | city | Ireland | 52.45 | -7.95 | 252 | 1908 | |
| Hynestown | city | Fingal | Ireland | 53.58 | -6.28 | 830 | 2854 |