The Nine Arches Bridge is a viaduct over the River Dodder in Milltown, Dublin, Ireland.

The bridge is included on the Record of Protected Structures maintained by Dublin City Council.

[1] The bridge was completed in 1854 for the Harcourt Street railway line.

Handrails were fitted to the side of the bridge and overhead power lines were added for the trams.

The bridge was first used in testing in February 2004[2] and officially reopened on 30 June 2004.