There are 21 post offices under PIN code 124103.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Arya Nagar Jhajjar S.O | Sub Office | Non-Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 2 | Dadanpur B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 3 | Dadri Toe B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 4 | Dawla Raiya B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 5 | Gawalison B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 6 | Gudha B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 7 | Gurukul Jhajjar B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 8 | Hasanpur B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 9 | Jahazgarh B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 10 | Jhajjar S.O | Sub Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 11 | Jondhi B.O | Branch Office | Delivery | Jondhi | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 12 | Khatiwas B.O | Branch Office | Delivery | Jahjjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 13 | Kheri Kumar B.O | Branch Office | Delivery | Jhajajr | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 14 | M.P.Majra B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 15 | Palra B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 16 | Silana B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 17 | Silani B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 18 | Sulodha B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 19 | Talao B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 20 | Utlodha B.O | Branch Office | Delivery | Jhajjar | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |
| 21 | Yakubpur B.O | Branch Office | Delivery | Jhajjr | Jhajjar | Rohtak | Ambala Hq | Haryana | Haryana |