Combe Moor, also known as Coombes Moor, is a linear hamlet in the civil parish of Byton in Herefordshire, England, to the south-east of the Welsh town of Presteigne, near the border with Wales, and north-west from the county town of Hereford. During the Devensian period, "the eastward advance of the Wye Glacier blocked the preglacial Lugg at Combe Moor and the river cut a new course to the north-east before turning south-east through the east-to-west ridge via the Covenhope Gap." Cross and Hodgson described the sediments of the Combe Moor basin in 1975 as "finely laminated and stoneless."
Combe Moor lies to the south-east of Combe, just to the south-west of the village of Byton. Brandhill Wood lies to the south and Park Hill to the north-east.