Onnalvadi Sub-Center
| Hospital Name | Onnalvadi Sub-Center |
| Address | Hsc-Onnalavadi |
| Address Line2 | |
| Location | Onnalavadi |
| Phone No. | N. A. |
| Mobile No. | N. A. |
| Facility | SubCentre |
| State | Tamil Nadu |
| District | Krishnagiri |
| Taluka | Hosur |
| Block | Hosur MPTY |
| GPS Location | Latitude: 12.6836 |
| Longitude: 77.8592 |
Onnalvadi Sub-Center hospital is a SubCentre in Hosur MPTY. It is located in Krishnagiri district of Tamilnadu state. The GPS Location of this hospital is shown in the map below.