County Hall (Welsh: Neuadd y Sir Rhuthun) is a municipal building in Wynnstay Road, Ruthin, Denbighshire, Wales.

The first public building in the town was the old court house in St Peter's Square which, in its current incarnation, dated back to 1421.

However, by the early 20th century, the county leaders considered the building to be too small and decided to commission a more substantial structure.

The corner bay featured a round headed doorway with a fanlight and voussoirs on the ground floor and a carved panel above; there were three small windows on the first floor separated by colonnettes; the bay was flanked by full-height Ionic order columns supporting a modillioned segmental pediment.

A large modern building was then built behind the facade, with the works being procured under a private finance initiative contract.