Post Offices List in Sibley County, Minnesota:
| Arlington Post Office | 220 W Main St, Arlington, MN 55307 |
| Gaylord Post Office | 311 Main Ave, Gaylord, MN 55334 |
| Gibbon Post Office | 1070 1st Ave, Gibbon, MN 55335 |
| Green Isle Post Office | 500 Mcgrann St, Green Isle, MN 55338 |
| Henderson Post Office | 500 Main St, Henderson, MN 56044 |
| New Auburn Post Office | 8301 8th Ave, New Auburn, MN 55366 |
| Winthrop Post Office | 215 E 2nd St, Winthrop, MN 55396 |