| Zip Code | City | Population ↓ |
|---|---|---|
| 44903 | Mansfield | 25,642 |
| 44906 | Mansfield | 17,343 |
| 44907 | Mansfield | 16,349 |
| 44905 | Mansfield | 16,245 |
| 44875 | Shelby | 14,144 |
| 44904 | Mansfield | 13,450 |
| 44813 | Bellville | 8,994 |
| 44902 | Mansfield | 4,636 |
| 44822 | Butler | 3,995 |
| 44878 | Shiloh | 2,712 |
| 44843 | Lucas | 2,445 |
| 44901 | Mansfield | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in Richland County, Ohio (US Census).