| Hardiya | |
| Settlement Type: | Village |
| Pushpin Map: | India Bihar#India |
| Pushpin Map Caption: | Location in Bihar, India |
| Coordinates: | 25.2477°N 84.3795°W[1] |
| Subdivision Type: | Country |
| Subdivision Name: | India |
| Subdivision Type1: | State |
| Subdivision Name1: | Bihar |
| Subdivision Type2: | District |
| Subdivision Name2: | Bhojpur |
| Unit Pref: | Metric |
| Area Total Km2: | 1.17 |
| Elevation M: | 87 |
| Population Total: | 1591 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Bhojpuri, Hindi |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
Hardiya is a village in Tarari block of Bhojpur district, Bihar, India. It is located in the western part of the block, near the border with Piro block. As of 2011, its population was 1,591, in 216 households.[2]