The Old Court House, is a judicial building in St Peter's Square in Ruthin, Denbighshire, North Wales.

Visible within are fine old roof timbers, and on the north-west outside corner is the stump of a gallows beam.

[3] The old court house was also in commercial use during the 18th century: in 1741 a petition was raised by butchers of the town and given to the owner Richard Myddleton complaining their meat was exposed to all elements of weather.

The butchers earned extra income by offering grandstand seating on the roof for views of the bear-baiting which took place on the Square.

[5] Then, in 1926 it was converted into a branch of the National Westminster Bank to the design of Frank Shayler and served in that role until its closure in 2017.