| Locality | Post Code |
|---|---|
| Cheonghak-Dong, Yeonsu (청학동) | 21901, 21902, 21903, 21904, 21905, … |
| Dongchun-Dong, Yeonsu (동춘동) | 21943, 21944, 21945, 21960, 21961, … |
| Ongnyeon-Dong, Yeonsu (옥련동) | 21900, 21939, 21940, 21941, 21942, … |
| Seonhak-Dong, Yeonsu (선학동) | 21907, 21908, 21909, 21910, 21911, … |
| Songdo-Dong, Yeonsu (송도동) | 21982, 21983, 21984, 21985, 21986, … |
| Yeonsu-Dong, Yeonsu (연수동) | 21911, 21912, 21913, 21914, 21918, … |
| Incheon Postal Codes | |
|---|---|
| Yeonsu (연수구) | Seo (서구) |
| Ongjin (옹진군) | Namdong (남동구) |
| Nam (남구) | Jung (중구) |
| Gyeyang (계양구) | Ganghwa (강화군) |
| Dong (동구) | Bupyeong (부평구) |