Wentwood (Welsh: Coed Gwent), in Monmouthshire, South Wales, is a forested area of hills, rising to 1,014 feet (309 m) above sea level.

It is the southernmost part of a range of hills formed by the relatively hard-wearing Brownstones sandstones which stretch in a rough arc northwards through eastern Monmouthshire, the broadly west-facing scarps of which are generally well wooded.

In the Middle Ages, the woods belonged to the lordship of Chepstow and provided hunting preserves, and timber, fuel and pasturage for the tenants of nearby manors.

In 1678 Wentwood was the scene of riots led by Nathan Rogers and Edward Kemys against the actions of Henry Somerset, 1st Duke of Beaufort who, as Lord Lieutenant of Monmouthshire and Governor of Chepstow Castle, enclosed some 3,000 acres (1,200 ha) of the forest for his own use, and began to fell trees for use in his ironworks at Tintern.

The tenants of the area, including Rogers, claimed that the ancient rights to the forest belonged to them, and rioted when 50 of Somerset's armed men arrived to carry away the felled wood.

When the area was replanted by the Forestry Commission in the 1950s and 1960s, the original broadleaved deciduous trees were largely replaced with non-native conifers, damaging the woodland habitat.