Belderrig
Béal Deirg 
    Belderg  | |
|---|---|
Village  | |
Pub in Belderg  | |
| Coordinates: 54°18′00″N 9°33′00″W / 54.3000°N 9.5500°W | |
| Country | Ireland | 
| Province | Connacht | 
| County | County Mayo | 
| Elevation | 93 m (305 ft) | 
| Irish Grid Reference | F991401 | 
| Béal Deirg is the only official name. The anglicized spellings Belderg and Belderrig have no official status. | |
Béal Deirg (anglicized as Belderg or Belderrig) is a Gaeltacht village and townland in County Mayo, Ireland. At Belderrig Harbour there is a Mesolithic / Neolithic site dating to 4500-2500 cal. BC. The Céide Fields archaeological site lies about 6 km to the east of Belderrig.