| Aglomeration CASO |
| VILLES | NOMBRE_HABITANTS | SUPERFICIE | RATIO HAB/HECTARE |
| MORINGHEM | 390 | 998 | 0.39 |
| CLAIRMARAIS | 717 | 1801 | 0.40 |
| SERQUES | 1034 | 1043 | 0.99 |
| EPERLECQUES | 2935 | 2550 | 1.15 |
| SALPERWICK | 487 | 400 | 1.22 |
| TILQUES | 947 | 720 | 1.32 |
| HOULLE | 917 | 652 | 1.41 |
| MOULLE | 931 | 530 | 1.76 |
| HELFAUT | 1670 | 892 | 1.82 |
| CAMPAGNE LES WARDRECQUES | 947 | 471 | 2.02 |
| HALLINES | 1422 | 554 | 2.57 |
| WARDRECQUES | 1088 | 371 | 2.93 |
| TATINGHEM | 1773 | 560 | 3.17 |
| ARQUES | 9457 | 2241 | 4.21 |
| WIZERNES | 3509 | 616 | 5.70 |
| BLENDECQUES | 5278 | 919 | 5.74 |
| SAINT MARTIN AU LAERT | 3993 | 494 | 8.02 |
| SAINT OMER | 16595 | 1659 | 10.00 |
| LONGUENESSE | 13292 | 835 | 15.92 |
| *** TOTAL AGLOMERATION *** | 67382 | 18306 | 3.68 |