| Clonmellon | |
| Native Name: | Irish: Ráistín |
| Native Name Lang: | ga |
| Settlement Type: | Village |
| Pushpin Map: | Ireland |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Ireland |
| Subdivision Type: | Country |
| Subdivision Name: | Ireland |
| Subdivision Type1: | Province |
| Subdivision Name1: | Leinster |
| Subdivision Type3: | County |
| Subdivision Name3: | County Westmeath |
| Unit Pref: | Metric |
| Population As Of: | 2016 |
| Population Footnotes: | [1] |
| Population: | 664 |
| Coordinates: | 53.6643°N -7.0194°W |
| Elevation M: | 108 |
| Blank Name: | Irish Grid Reference |
Clonmellon (but also attested to originally have been Cluain Miolain[2]) is a small village officially in County Westmeath[3] although on the border with County Meath, Ireland. It is situated on the N52 road between Kells in County Meath and Delvin in County Westmeath.
Ballinlough Castle, a 17th-century country house is located nearby. The 18th-century Killua Castle is also located close to Clonmellon.[4]