| Country: | IRL |
| Type: | R |
| Route: | 123 |
The R123 road is a regional road in Fingal, Ireland.
The official description of the R123 from the Roads Act 1993 (Classification of Regional Roads) Order 2012 [1] reads:
R123: Maynetown - Balgriffin, County Dublin
Between its junction with R106 at Maynetown and its junction with R107 at Balgriffin via Snugborough and Balgriffin Park all in the county of Fingal.