| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Ja-Ela | city | Western Province | Sri Lanka | 7.0844444 | 79.8947222 | 13 | 156693 |
| Jaffna | city | North Eastern Province | Sri Lanka | 9.6666667 | 80 | 0 | 52648 |
| Jaffna Town | city | North Eastern Province | Sri Lanka | 9.6666667 | 80 | 0 | 52648 |
| Jagama | city | North Western Province | Sri Lanka | 7.95 | 80.3 | 337 | 45372 |
| Jahakagama | city | Central Province | Sri Lanka | 7.7 | 80.5833333 | 1115 | 34058 |
| Jahapagama | city | North Western Province | Sri Lanka | 7.65 | 80.4333333 | 419 | 45406 |
| Jakaduwa | city | North Western Province | Sri Lanka | 7.45 | 80.5 | 1509 | 56677 |
| Jalampitiya | city | Southern Province | Sri Lanka | 6.2261111 | 80.7402778 | 462 | 31470 |
| Jalatgama | city | North Western Province | Sri Lanka | 7.9333333 | 80.3833333 | 889 | 42127 |
| Jaligoda | city | Western Province | Sri Lanka | 6.8166667 | 79.9166667 | 88 | 428641 |
| Jaltara | city | Western Province | Sri Lanka | 6.9 | 80.05 | 239 | 383201 |
| Jambugaswadiya | city | Western Province | Sri Lanka | 7.2666667 | 79.9 | 36 | 104077 |
| Jamburegoda | city | Southern Province | Sri Lanka | 6.0166667 | 80.4166667 | 216 | 88097 |
| Jambureliya | city | Western Province | Sri Lanka | 6.7666667 | 79.95 | 72 | 307220 |
| Jamburutugoda | city | Southern Province | Sri Lanka | 6.0166667 | 80.4 | 147 | 87108 |
| Jandura | city | Southern Province | Sri Lanka | 6.1783333 | 80.8652778 | 131 | 31160 |
| Jangula | city | Province of Uva | Sri Lanka | 7 | 81.0166667 | 3241 | 37206 |
| Jangulle | city | Province of Uva | Sri Lanka | 7 | 81.0166667 | 3241 | 37206 |
| Jankurawela | city | North Western Province | Sri Lanka | 7.2833333 | 79.9166667 | 29 | 122005 |
| Jankure | city | North Western Province | Sri Lanka | 7.5166667 | 80.5166667 | 898 | 43069 |
| Jansagama | city | Southern Province | Sri Lanka | 6.15 | 80.9833333 | 52 | 29504 |
| Jasingama | city | Province of Uva | Sri Lanka | 6.9333333 | 80.9 | 3421 | 41544 |
| Jatunkanda | city | Province of Sabaragamuwa | Sri Lanka | 6.3666667 | 80.6333333 | 2417 | 62914 |
| Jawatta | city | Western Province | Sri Lanka | 6.6166667 | 79.9666667 | 16 | 69215 |
| Jayalatgama | city | North Western Province | Sri Lanka | 7.8 | 80.2166667 | 318 | 45386 |
| Jayalathgama | city | North Western Province | Sri Lanka | 7.8 | 80.2166667 | 318 | 45386 |
| Jayanthipura | city | North Central Province | Sri Lanka | 8 | 81 | 154 | 14294 |
| Jayarajapuraya | city | North Western Province | Sri Lanka | 7.8666667 | 79.8666667 | 65 | 29724 |
| Jayasirigama | city | North Western Province | Sri Lanka | 7.6166667 | 80.1166667 | 226 | 45410 |
| Jayasirigama | city | North Western Province | Sri Lanka | 7.6333333 | 80.1333333 | 242 | 45406 |
| Jayasundaragedara | city | North Western Province | Sri Lanka | 7.6333333 | 80.25 | 410 | 45406 |
| Jayasundaragedera | city | North Western Province | Sri Lanka | 7.6333333 | 80.25 | 410 | 45406 |
| Jayasurigama | city | North Western Province | Sri Lanka | 7.6166667 | 80.1166667 | 226 | 45410 |
| Jeewana | city | Province of Sabaragamuwa | Sri Lanka | 7.2833333 | 80.3 | 482 | 62925 |
| Jeewandeniya | city | Province of Sabaragamuwa | Sri Lanka | 7.2833333 | 80.3333333 | 856 | 62925 |
| Jiwana | city | Province of Sabaragamuwa | Sri Lanka | 7.2833333 | 80.3 | 482 | 62925 |
| Jiwanadeniya | city | Province of Sabaragamuwa | Sri Lanka | 7.2833333 | 80.3333333 | 856 | 62925 |
| Jiwanawatta | city | Central Province | Sri Lanka | 7.3666667 | 80.6 | 1538 | 72741 |
| Jomahandigoda | city | Southern Province | Sri Lanka | 6.15 | 80.1 | 13 | 51574 |
| Jorseygoda | city | Southern Province | Sri Lanka | 6.3666667 | 80.0166667 | 6 | 48682 |
| Jorsigoda | city | Southern Province | Sri Lanka | 6.3666667 | 80.0166667 | 6 | 48682 |
| Julampitiya | city | Southern Province | Sri Lanka | 6.2261111 | 80.7402778 | 462 | 31470 |
| Julamulla | city | Southern Province | Sri Lanka | 6.1513889 | 80.8497222 | 177 | 30867 |
|
|