| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Jamioulx | city | Province de Hainaut | Belgium | 50.35 | 4.4 | 426 | 76055 |
| Jardin | city | Province de Hainaut | Belgium | 50.6 | 3.7666667 | 213 | 15572 |
| Jemappes | city | Province de Hainaut | Belgium | 50.45 | 3.8833333 | 131 | 74747 |
| Jolimont | city | Province de Hainaut | Belgium | 50.4666667 | 4.2 | 387 | 84537 |
| Jollain-Merlin | city | Province de Hainaut | Belgium | 50.5333333 | 3.4 | 104 | 18838 |
| Joncquiere | city | Province de Hainaut | Belgium | 50.6833333 | 3.2833333 | 62 | 88697 |
| Joncquière | city | Province de Hainaut | Belgium | 50.6833333 | 3.2833333 | 62 | 88697 |
| Joncquois | city | Province de Hainaut | Belgium | 50.7333333 | 3.4333333 | 72 | 17181 |
| Joncquois | city | Province de Hainaut | Belgium | 50.4833333 | 3.7333333 | 131 | 27399 |
| Joncret | city | Province de Hainaut | Belgium | 50.35 | 4.5 | 652 | 52256 |
| Jublicehainaut | city | Province de Hainaut | Belgium | 50.5333333 | 3.9333333 | 272 | 26910 |
| Jumet | city | Province de Hainaut | Belgium | 50.4333333 | 4.4166667 | 452 | 155462 |
| Jurbeke | city | Province de Hainaut | Belgium | 50.5333333 | 3.9333333 | 272 | 26910 |
| Jurbise | city | Province de Hainaut | Belgium | 50.5333333 | 3.9333333 | 272 | 26910 |
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