Sampford Brett is a village and civil parish situated at the north-western edge of the Quantock Hills, Somerset, England, less than 1 mile (1.6 km) south of Williton, just off the A358 road to Taunton. It lies in a shallow valley cut by the Sampford stream running from Aller Farm, and its main street runs east-west from the church to the crossroads at the western end. To the south and east of the village there is a good view of the Quantock Hills and it is shielded from the main road by the rising hill to the north.