Dinorwig (/dɪˈnɔːrwɪɡ/ din-OR-wig; ; Welsh: [dɪˈnɔrwɪɡ]), historically spelled as Dinorwic in English, is a village located high above Llyn Padarn, near Llanberis, in Wales.

The name is shared with the fort of Dinas Dinorwig, also within the community of Llanddeiniolen, on a foothill 6 kilometres (3.7 mi) from Dinorwig village and 3 kilometres (1.9 mi) from the Menai Strait[1] and also with Port Dinorwic, the anglicised name of Y Felinheli.

The element -orwig, -orweg has been thought to derive from the tribal name Ordovices;[2] this idea was rejected by linguist Melville Richards for lack of a sufficiently early record of a form *Orddwig..[3] Dinorwig is one of the main access points for Dinorwic quarry.

After the First World War, cheaper alternative roofing materials became available and production at the quarry declined.

This led to a decline in the fortune of the village itself and many moved away to nearby towns such as Bangor and Caernarfon.