The Old Library is a Grade II* listed building in Cardiff, Wales. It is located in the centre of the city at the northern end of The Hayes. Originally the Cardiff Free Library, it was used as the city's Central Library until it was replaced in 1988. It has been used for other purposes since that time and is currently the home of the Cardiff Story museum and Menter Caerdydd, a community-based Menter Iaith organisation which works to raise the profile of the Welsh language in Cardiff.

The Hayes is a commercial area in the southern city centre of the Welsh capital, Cardiff. Centred on the road of that name leading south towards the east end of the city centre, the area is mostly pedestrianised and is the location of the Hayes Island Snack Bar.