| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Singwan-Dong, Gunsan (신관동) | 54150, 54157, 54167, 54169, 54172 |
| Postal/ZIP Codes in Sinheung-Dong, Gunsan (신흥동) | 54020, 54023 |
| Postal/ZIP Codes in Sinpung-Dong, Gunsan (신풍동) | 54113, 54114, 54115, 54116 |
| Postal/ZIP Codes in Sinyeong-Dong, Gunsan (신영동) | 54026, 54027, 54030 |
| Postal/ZIP Codes in Songchang-Dong, Gunsan (송창동) | 54024, 54025 |
| Postal/ZIP Codes in Songpung-Dong, Gunsan (송풍동) | 54111, 54112, 54113 |
| Postal/ZIP Codes in Soryong-Dong, Gunsan (소룡동) | 54004, 54005, 54006, 54007, 54008, … |
| Postal/ZIP Codes in Susong-Dong, Gunsan (수송동) | 54081, 54082, 54083, 54084, 54087, … |
| Postal/ZIP Codes in Wolmyeong-Dong, Gunsan (월명동) | 54022, 54023 |
| Postal/ZIP Codes in Yeong-Dong, Gunsan (영동) | 54027 |
| Postal/ZIP Codes in Yeonghwa-Dong, Gunsan (영화동) | 54021, 54026 |