Ganwan is Taluka (Tehsil) in Giridh district of Jharkhand state. Ganwan has 7 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 815313 | Bendro PIN Code | Giridh | Ganwan | Branch Office |
| 815313 | Birney PIN Code | Giridh | Ganwan | Branch Office |
| 815313 | Charki PIN Code | Giridh | Ganwan | Branch Office |
| 815313 | Kahuwai PIN Code | Giridh | Ganwan | Branch Office |
| 815313 | Manjhney PIN Code | Giridh | Ganwan | Branch Office |
| 815313 | Pihra PIN Code | Giridh | Ganwan | Branch Office |
| 815313 | Sankh PIN Code | Giridh | Ganwan | Branch Office |