| Country: | IRL |
| Type: | R |
| Route: | 439 |
| Image Notes: | Green Street, Birr, on the R439 |
| Length Km: | 13 |
| Destinations: |
The R439 road is a regional road in Ireland linking Birr with Banagher in County Offaly. The route is about 13km (08miles) in length.
The road begins with a junction on the N52 road at Emmet Square at the centre of Birr Town and continues northwards taking the following routes through the town; Green Street, Rosse Row, Model School Road, Eden Road & Cappaneale. The road continues northwards forming a crossroads junction with the R438 at Taylor's Cross. The road continues into Banagher as Birr Road & Main Street. The route terminates in Main Street at the junction with the R356.