Tafarnaubach is a village on the Sirhowy River in the county borough of Blaenau Gwent, in south-east Wales.

Located within the historic boundaries of Monmouthshire, it lies about two miles west of Tredegar town centre.

To the south of the village lies a small country park, Parc Bryn Bach, while the northern part of the district is dominated by the Tafarnaubach Industrial Estate.

The village is overlooked by Mynydd Llangynidr mountain, which in the late 19th century was infamous for illegal bare-knuckle boxing mountain fights due to its proximity to three county borders.

Also nearby is Ron Skinner & Sons, car dealers of Tredegar.