| Laburnam Drive, Termon Abbey | — | 16 |
| Laburnum Drive, Termon abbey | — | 5 |
| Laburnum Sq, Drogheda | €170,000 | 5 |
| Ladywell Sq, Dundalk | — | 6 |
| Lambs Terrace, Ardee | — | 5 |
| Langfield, Dublin Road | €263,000 | 13 |
| Langfield Close, Dublin Road | — | 9 |
| Laurel Brook Gardens, Dundalk | €229,000 | 9 |
| laurel grove, greenacres | — | 5 |
| Laurel Grove, Avenue Road | — | 7 |
| Legavoureen Park, Drogheda | — | 7 |
| legion ave, dundalk | €285,000 | 10 |
| Lennon Melia Terrace, Dundalk | — | 10 |
| Lennonstown Green, Lennonstown Manor | — | 5 |
| Lennonstown Green, Red Barns Rd | €240,000 | 13 |
| Lennonstown Manor, Dundalk | — | 7 |
| Lennonstown Manor, Red Barns Road | — | 7 |
| Limekiln Drive, Bog Lane | — | 6 |
| Limetree Ave, Termon Abbey | — | 8 |
| Linenfield Crescent, Ballymackenny Road | €254,626 | 9 |
| Linenfield Crescent, Ballymakenny Road | €281,057 | 37 |
| Linenfield Way, Ballymakenny Road | €275,936 | 15 |
| Linenhall Street, Dundalk | — | 8 |
| Liscorrie, Drogheda | — | 7 |
| Liscorrie Hall, Bog Lane | — | 6 |
| Liscorrie Hall, Liscorrie Bog Lane | — | 6 |
| Lislea, Omeath | — | 6 |
| Lismore, Earlsfort | €318,500 | 47 |
| Lismore Earlsfort, Seafield Road | — | 6 |
| Lisroland View, Knockbridge | €375,000 | 8 |
| Listoke Avenue, Ballymakenny Road | €258,956 | 65 |
| Listoke Avenue, Liscorrie | — | 5 |
| Listoke Court, Liscorrie | — | 6 |
| Listoke Drive, Ballymakenny Road | €386,683 | 32 |
| Listoke Elms, Ballymakenny Road | €325,927 | 82 |
| Listoke Pines, Ballymakenny Road | €365,639 | 55 |
| Listoke Wood, Ballymakenny Road | €416,299 | 37 |
| Little Mills, Dundalk | — | 6 |
| long avenue, dundalk | — | 12 |
| Longwood, Dublin Road | — | 9 |
| Loughantarve, Knockbridge | €243,000 | 64 |
| Lourdes Square, Drogheda | — | 8 |
| Louth Hall, Tallanstown | — | 7 |
| Lower Point Road, Dundalk | — | 7 |
| Lurgankeel, Kilcurry | €375,000 | 11 |
| Lynchs Cross, Tullyallen | — | 6 |
| Lynns, Annagassan | — | 5 |
| The Laurels, Dundalk | — | 9 |
| The Links, Seapoint | — | 15 |
| The Lynns, Annagassan | — | 8 |