| Hussainganj | |
| Settlement Type: | CD Block |
| Seat Type: | Headquarters |
| Seat: | Hussainganj (town) |
| Pushpin Map: | Bihar |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Bihar, India |
| Coordinates: | 26.1437°N 84.325°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Bihar |
| Subdivision Type2: | District |
| Subdivision Name2: | Siwan |
| Subdivision Type3: | Subdivision |
| Subdivision Name3: | Siwan |
| Governing Body: | Hussainganj block |
| Unit Pref: | Metric |
| Area Total Km2: | 85.37 |
| Population Total: | 182794 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Bhojpuri, Hindi, Urdu, English |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Area Code Type: | Telephone code |
| Blank1 Name Sec1: | Sex ratio |
Hussainganj is a community development block and a town in district of Siwan, in Bihar state of India. It is one of 13 blocks of Siwan subdivision. The headquarters of the block is at Hussainganj town.
The total area of the block is 85.37km2 and the total population of the block as of the 2011 census of India is 1,82,794.[1]
The block is divided into many gram panchayats and villages.
The following are the gram panchayats of Hussainganj block in Siwan subdivision, Siwan district.[2]