Pwll Du (meaning a black or dark pool or pit) was a village in Monmouthshire, Wales.

The main employment was provided by nearby limestone quarries and by the iron works in Blaenavon.

The Pwll Du Tunnel from Blaenavon, once the longest horse-powered tramway in Britain, ended near the village.

A pub and the former Welfare Hall, now a school's outdoor pursuits centre, are all that are left standing.

The houses were demolished in 1963 after the remaining residents had been moved, most of them to Govilon, a village further down the hill.

[9] After about 1850 cast iron from Blaenavon was carried over the Dyne Steel Incline and then down Hill's Tramroad.