Portbury is a village and civil parish in Somerset, England, within the unitary authority of North Somerset. The parish includes the hamlet Sheepway, which is situated on moorland at the northern edge of the Gordano valley, between the Gordano services on the M5 motorway and Portishead, near the Royal Portbury Dock. The parish has a population of 827.

North Somerset is a unitary authority in the ceremonial county of Somerset, England. The council is based in Weston-super-Mare, the area's largest town. The district also contains the towns of Clevedon, Nailsea and Portishead, along with a number of villages and surrounding rural areas. Some southern parts of the district fall within the Mendip Hills, a designated Area of Outstanding Natural Beauty.