Post Offices List in Colfax City, California:
| Colfax Post Office | 40 W Church St, Colfax, CA 95713 |
| Iowa Hill Post Office | 3181 Iowa Hill Rd, Colfax, CA 95713 |
| Colfax Post Office | 40 W Church St, Colfax, CA 95713 |
| Iowa Hill Post Office | 3181 Iowa Hill Rd, Colfax, CA 95713 |