| Knockanaffrin | |
| Other Name: | Cnoc an Aifrinn |
| Elevation M: | 755 |
| Elevation Ref: | [1] [2] |
| Prominence M: | 289 |
| Listing: | Hewitt, Marilyn |
| Translation: | hill of the mass |
| Language: | Irish |
| Location: | County Waterford, Republic of Ireland |
| Range: | Comeragh Mountains |
| Map: | island of Ireland |
| Map Relief: | yes |
| Coordinates: | 52.2892°N -7.5822°W |
Knockanaffrin [1] is a mountain in County Waterford, Ireland. It is part of the Comeragh Mountains.[1]