| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
151  | Lough Mourne  Lough Mourne | Ireland, Ulster Donegal | lake | N 54° 45′ 15'' | W 7° 53′ 45'' |
152  | County Monaghan Contae Mhuineachain,Contae Mhuineacháin,Monaghan,Muineachan,Muineachán | Ireland, Ulster Monaghan | second-order administrative division population 61,386 | N 54° 15′ 0'' | W 7° 0′ 0'' |
153  | Millstreet Millstreet,Milstrit,Sraid an Mhuilinn,Sráid an Mhuilinn,mirusutorito,Милстрит,ミルストリート | Ireland, Munster Cork | populated place population 1,555 | N 52° 3′ 33'' | W 9° 3′ 37'' |
| 154 | Midleton Mainister na Corann,Mainistir na Corann,Middleton,Midleton,Midlton,Midltonas,Midultun,mi de lei dun,... | Ireland, Munster Cork | populated place population 12,496 | N 51° 54′ 54'' | W 8° 10′ 49'' |
| 155 | Lough Meelagh Lough Meelagh | Ireland, Connacht County Roscommon | lake | N 54° 3′ 30'' | W 8° 10′ 9'' |
| 156 | Lough Meela Lough Meela | Ireland, Ulster Donegal | lake | N 54° 58′ 11'' | W 8° 24′ 14'' |
| 157 | Meath Co Meath,Contae na Mi,Contae na Mí,County Meath,Meath | Ireland, Leinster Meath | second-order administrative division population 220,296 | N 53° 40′ 0'' | W 6° 40′ 0'' |
| 158 | County Mayo Contae Mhaigh Eo,County Mayo,Mayo | Ireland, Connacht County Mayo | second-order administrative division population 130,507 | N 53° 54′ 0'' | W 9° 15′ 0'' |
| 159 | Lough Mask Lough Mask | Ireland, Connacht County Mayo | lake | N 53° 37′ 0'' | W 9° 21′ 0'' |
| 160 | Malahide Malahaidas,Malahide,Malakhajd,Mullach Ide,Mullach Íde,ma la hai de,malaha'ida,malahayd,marahaido,Мал... | Ireland, Leinster Fingal | populated place population 16,550 | N 53° 27′ 3'' | W 6° 9′ 16'' |
| 161 | Macroom Macroom,Maigh Chromtha,Makrum,Makrumas,ma ke long,makurumu,mykrwm,Макрум,میکروم,マクルーム,馬克隆,马克隆 | Ireland, Munster Cork | populated place population 3,765 | N 51° 54′ 23'' | W 8° 58′ 10'' |
| 162 | Lucan Leamhcan,Leamhcán,Lucan,Lucanas,Lukan,lu ken,lwkan,rukan,Лукан,لوکان,لوکن، ڈبلن,ルーカン,卢肯,盧肯 | Ireland, Leinster South Dublin | populated place population 15,269 | N 53° 21′ 26'' | W 6° 26′ 54'' |
| 163 | Co Louth Co Louth,Contae Lu,Contae Lú,County Louth,Louth | Ireland, Leinster Louth | second-order administrative division population 139,100 | N 53° 50′ 0'' | W 6° 30′ 0'' |
| 164 | Loughrea Baile Locha Riach,Lokhrej,Lokrej,Loughrea,lokhrei,rohhori,Локреј,Лохрей,لوخرے,ლოხრეი,ロッホリー | Ireland, Connacht Galway | populated place population 5,556 | N 53° 11′ 49'' | W 8° 34′ 1'' |
| 165 | Co Longford Co Longford,Contae an Longfoirt,County Longford,Longford | Ireland, Leinster Co Longford | second-order administrative division population 40,873 | N 53° 40′ 0'' | W 7° 45′ 0'' |
| 166 | Longford An Longfort,Longford,Longfordas,lamgafarda,lang fu de,longpeodeu,longpordi,lwnjfwrd,rongufodo,Лонгфо... | Ireland, Leinster Co Longford | seat of a second-order administrative division population 7,787 | N 53° 43′ 31'' | W 7° 47′ 53'' |
| 167 | Listowel Lios Tuathail,Listouehl,Listouul,Listowel,li si tuo er,liseutowel,Листоуъл,Листоуэл,لیسٹول,利斯托尔,리스토웰 | Ireland, Munster Co Kerry | populated place population 4,820 | N 52° 26′ 47'' | W 9° 29′ 6'' |
| 168 | Limerick Contae Luimnigh,Limerick,Luimneach | Ireland, Munster Limerick | historical second-order administrative division population 134,703 | N 52° 30′ 0'' | W 8° 45′ 0'' |
| 169 | Lickeen Lough Lickeen Lough | Ireland, Munster Clare | lake | N 52° 58′ 0'' | W 9° 13′ 48'' |
| 170 | Levally Lough Levally Lough | Ireland, Connacht County Mayo | lake | N 53° 58′ 51'' | W 9° 18′ 14'' |
| 171 | Lettercraffroe Lough Lettercraffroe,Lettercraffroe Lough | Ireland, Connacht Galway | lake | N 53° 22′ 54'' | W 9° 24′ 51'' |
| 172 | Lough Lene Lough Lene | Ireland, Leinster County Westmeath | lake | N 53° 39′ 37'' | W 7° 13′ 42'' |
| 173 | Leixlip Leikslipas,Leim an Bhradain,Leixlip,Lejkslip,Lijkslip,Likslip,Léim an Bhradáin,lai ke si li pu,lyksl... | Ireland, Leinster Co Kildare | populated place population 15,504 | N 53° 21′ 57'' | W 6° 29′ 44'' |
| 174 | County Leitrim Comitatul Leitrim,Comitatus Letrimensis,Comtat de Leitrim,Comte de Leitrim,Comté de Leitrim,Condado ... | Ireland, Connacht Leitrim | second-order administrative division population 32,044 | N 54° 7′ 0'' | W 8° 0′ 0'' |
175  | Leinster Cuige Laighean,Cúige Laighean,Leinster,Province of Leinster | Ireland, Leinster Co Kildare | region | N 53° 5′ 0'' | W 7° 0′ 0'' |
| 176 | Lough Leane Lough Leane,Lower Lake | Ireland, Munster Co Kerry | lake | N 52° 2′ 0'' | W 9° 33′ 0'' |
| 177 | Laytown An Inse,Laytown,Leitaunas,Lejtaun,Лейтаун | Ireland, Leinster Meath | populated place population 10,889 | N 53° 40′ 55'' | W 6° 14′ 21'' |
| 178 | Laois Contae Laoighise,Contae Laoise,County Laois,Laoighis,Laois,Leix,Queen's County | Ireland, Leinster Laois | second-order administrative division population 84,697 | N 53° 0′ 0'' | W 7° 24′ 0'' |
| 179 | Lady’s Island Lake Lady's Island Lake,Lady’s Island Lake | Ireland, Leinster County Wexford | lake | N 52° 11′ 28'' | W 6° 23′ 17'' |
| 180 | Kylemore Lough Kylemore Lough | Ireland, Connacht Galway | lake | N 53° 33′ 38'' | W 9° 51′ 9'' |
| 181 | Kinsale Cionn tSaile,Cionn tSáile,Kinsale,Kinseilis,Kinsejl,Kione Sailley,knsyyl,qynsyyl,Кинсейл,קינסייל,کنس... | Ireland, Munster Cork | populated place population 5,281 | N 51° 42′ 27'' | W 8° 31′ 50'' |
| 182 | Lough Kinale Lough Kinale | Ireland, | lake | N 53° 46′ 0'' | W 7° 24′ 0'' |
| 183 | Kiltooris Lough Kiltooris Lough | Ireland, Ulster Donegal | lake | N 54° 49′ 12'' | W 8° 30′ 3'' |
| 184 | Killybegs Kilibegs,Killibegs,Killybegs,Na Ceala Beaga,Na Cealla Beaga,Килибегс,Киллибегс | Ireland, Ulster Donegal | populated place population 1,236 | N 54° 38′ 0'' | W 8° 27′ 0'' |
| 185 | Killinure Lough Killinure Lough,Lough Killinare | Ireland, Leinster County Westmeath | lake | N 53° 27′ 0'' | W 7° 54′ 0'' |
| 186 | Killarney Cill Airne,Killarney | Ireland, Munster Co Kerry | populated place population 14,504 | N 52° 3′ 35'' | W 9° 30′ 30'' |
| 187 | County Kilkenny Canicopolis,Cantae Chill Chainnigh,Cill Chainnigh,County Kilkenny,Keeill Chennee,Kilkeni,Kilkenis,Ki... | Ireland, Leinster County Kilkenny | second-order administrative division population 99,232 | N 52° 35′ 0'' | W 7° 15′ 0'' |
| 188 | Kilglass Lough Kilglass Lough | Ireland, Connacht County Roscommon | lake | N 53° 49′ 0'' | W 8° 1′ 0'' |
| 189 | Co Kildare Cill Dara,Co Kildare,Contae Chill Dara,County Kildare,Kildare | Ireland, Leinster Co Kildare | second-order administrative division population 222,504 | N 53° 10′ 0'' | W 6° 45′ 0'' |
| 190 | Kildare Cill Dara,Keeill Darey,Kildehr,Kilderas,Kildeur,Килдеър,Килдэр,کلڈیئر | Ireland, Leinster Co Kildare | populated place population 8,634 | N 53° 9′ 22'' | W 6° 54′ 52'' |
| 191 | Kilcock Cill Choca,Kilcock,Kilkok,Kilkokas,Kilkuk,klkwk,qylqwq,Килкок,Килкък,קילקוק,کلکوک | Ireland, Leinster Co Kildare | populated place population 5,533 | N 53° 24′ 8'' | W 6° 40′ 15'' |
| 192 | Lough Key Lough Key | Ireland, Connacht County Roscommon | lake | N 54° 0′ 0'' | W 8° 15′ 0'' |
| 193 | Co Kerry Co Kerry,Contae Chiarrai,Contae Chiarraí,County Kerry,KIR,Kerry | Ireland, Munster Co Kerry | second-order administrative division population 155,258 | N 52° 10′ 0'' | W 9° 45′ 0'' |
| 194 | Kenmare An Neidin,An Neidín,Kenmare,Kenmehr,Kevmare,Neidin,Кенмэр | Ireland, Munster Co Kerry | populated place population 2,175 | N 51° 53′ 0'' | W 9° 35′ 0'' |
| 195 | Kells Ceanannas,Ceanannas Mor,Ceanannas Mór,Ceanannus Mor,Ceanannus Mór,Kells,Kels,Kelsa,Kelsas,kai er si,... | Ireland, Leinster Meath | populated place population 4,820 | N 53° 43′ 35'' | W 6° 52′ 45'' |
| 196 | Islandeady Lough Islandeady Lough | Ireland, Connacht County Mayo | lake | N 53° 49′ 50'' | W 9° 22′ 58'' |
| 197 | Lough Iron Lough Iron | Ireland, Leinster County Westmeath | lake | N 53° 36′ 0'' | W 7° 28′ 0'' |
| 198 | Inchiquin Lough Inchiguin Lough,Inchiquin,Inchiquin Lough | Ireland, Munster Clare | lake | N 52° 57′ 21'' | W 9° 5′ 6'' |
| 199 | Inchicronan Lough Inchicronan Lough | Ireland, Munster Clare | lake | N 52° 55′ 13'' | W 8° 54′ 15'' |
| 200 | Lough Inagh | Ireland, Connacht Galway | lake | N 53° 30′ 55'' | W 9° 44′ 34'' |
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