| Postal/ZIP Codes in Beoreum-Dong, Osan (벌음동) |
18104, 18127 |
| Postal/ZIP Codes in Busan-Dong, Osan (부산동) |
18131, 18132, 18148, 18149 |
| Postal/ZIP Codes in Cheonghak-Dong, Osan (청학동) |
18119 |
| Postal/ZIP Codes in Cheongho-Dong, Osan (청호동) |
18151 |
| Postal/ZIP Codes in Dugok-Dong, Osan (두곡동) |
18128 |
| Postal/ZIP Codes in Eungye-Dong, Osan (은계동) |
18114, 18115, 18116, 18131 |
| Postal/ZIP Codes in Gajang-Dong, Osan (가장동) |
18103, 18104, 18117, 18124, 18125 |
| Postal/ZIP Codes in Galgot-Dong, Osan (갈곶동) |
18130, 18145, 18146, 18147, 18151 |
| Postal/ZIP Codes in Gasu-Dong, Osan (가수동) |
18119, 18125, 18126, 18130 |
| Postal/ZIP Codes in Geumam-Dong, Osan (금암동) |
18102, 18108, 18109, 18117 |
| Postal/ZIP Codes in Gohyeon-Dong, Osan (고현동) |
18145, 18150, 18151 |
| Postal/ZIP Codes in Gwol-Dong, Osan (궐동) |
18115, 18117, 18118, 18119, 18120, … |
| Postal/ZIP Codes in Jigot-Dong, Osan (지곶동) |
18102 |
| Postal/ZIP Codes in Naesammi-Dong, Osan (내삼미동) |
18106, 18108, 18110, 18112, 18113 |
| Postal/ZIP Codes in Nueup-Dong, Osan (누읍동) |
18125, 18126, 18127, 18128, 18130 |
| Postal/ZIP Codes in Oesammi-Dong, Osan (외삼미동) |
18111, 18112 |
| Postal/ZIP Codes in Osan-Dong, Osan (오산동) |
18129, 18130, 18131, 18132, 18133, … |
| Postal/ZIP Codes in Segyo-Dong, Osan (세교동) |
18102, 18105, 18106, 18107, 18111, … |
| Postal/ZIP Codes in Seo-Dong, Osan (서동) |
18104, 18125 |
| Postal/ZIP Codes in Seorang-Dong, Osan (서랑동) |
18100 |
| Postal/ZIP Codes in Sucheong-Dong, Osan (수청동) |
18110, 18114, 18115, 18116, 18118, … |
| Postal/ZIP Codes in Tap-Dong, Osan (탑동) |
18127, 18127, 18128 |
| Postal/ZIP Codes in Won-Dong, Osan (원동) |
18138, 18139, 18140, 18141, 18142, … |
| Postal/ZIP Codes in Yangsan-Dong, Osan (양산동) |
18101, 18105 |