| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Sakuranomori (つくば市) | 305-0019 |
| Postal/ZIP Codes in Sasagi (つくば市) | 305-0043 |
| Postal/ZIP Codes in Sengen (つくば市) | 305-0047 |
| Postal/ZIP Codes in Shibasaki (つくば市) | 305-0004 |
| Postal/ZIP Codes in Shima (つくば市) | 305-0833 |
| Postal/ZIP Codes in Shimana (つくば市) | 300-2655 |
| Postal/ZIP Codes in Shimobeppu (つくば市) | 300-2666 |
| Postal/ZIP Codes in Shimohara (つくば市) | 305-0063 |
| Postal/ZIP Codes in Shimohiratsuka (つくば市) | 305-0813 |
| Postal/ZIP Codes in Shimohiroka (つくば市) | 305-0042 |
| Postal/ZIP Codes in Shimoiwasaki (つくば市) | 300-1273 |
| Postal/ZIP Codes in Shimokawarazaki (つくば市) | 300-2662 |
| Postal/ZIP Codes in Shimokayamaru (つくば市) | 305-0872 |
| Postal/ZIP Codes in Shimooshima (つくば市) | 300-4222 |
| Postal/ZIP Codes in Shimoyokoba (つくば市) | 305-0075 |
| Postal/ZIP Codes in Shinozaki (つくば市) | 300-3264 |
| Postal/ZIP Codes in Shiroyama (つくば市) | 300-1251 |
| Postal/ZIP Codes in Shoei (つくば市) | 305-0014 |