The following are the zip codes in the municipalities and cities of South Cotabato.
| Region | Provinces | City/Municipality | Zip Code |
| Region 7 (Soccsksargen) | South Cotabato | Banga | 9511 |
| Region 7 (Soccsksargen) | South Cotabato | Gen. Santos City | 9500 |
| Region 7 (Soccsksargen) | South Cotabato | Koronadal | 9506 |
| Region 7 (Soccsksargen) | South Cotabato | Norala | 9508 |
| Region 7 (Soccsksargen) | South Cotabato | Polomolok | 9504 |
| Region 7 (Soccsksargen) | South Cotabato | Santo Nino | 9509 |
| Region 7 (Soccsksargen) | South Cotabato | Surallah | 9512 |
| Region 7 (Soccsksargen) | South Cotabato | Tampacan | 9507 |
