Rhiwderin (Welsh: Rhiwderyn) is a small village in the west of the city of Newport, South Wales.
The original village lies across a level crossing alongside the Ebbw Valley Railway and off the main A468 Newport—Caerphilly road.
There are additional houses on the other side of the main road known as Rhiwderin Heights which have almost merged the village with neighbouring Bassaleg.
Rhyderin lies on the route of the old Brecon and Merthyr Tydfil Junction Railway line.
Then reopening of the line for passenger traffic is being considered as part of the South East Wales Metro.