Coordinates: 52°24′25″N 2°48′11″W / 52.407°N 2.803°W
Onibury is a village and civil parish on the River Onny in southern Shropshire, about 4 miles (6.4 km) northwest of the market town of Ludlow.
The parish includes the hamlets of Walton and Wootton and was extended in 1967 to include parts from Clungunford and Stokesay. It borders the parishes of Clungunford, Stokesay (now part of Craven Arms parish), Bromfield, Culmington and Stanton Lacy. The country houses of Ferney Hall and Stokesay Court are in the parish.
The toponym "Onibury" is derived from the Old English for "fortified place on the River Onny". "Onny" means "river on whose banks ash trees grew", from the Welsh "on" meaning ashes.
Onibury is recorded in the Domesday Book of 1086 as Aneberie. It had 15 households, making it a fairly medium-sized settlement for the time. The manor formed part of the Saxon hundred of Culvestan.
Onibury came to be in the lower division of the hundred of Munslow, following the amalgamation of Culvestan and Patton hundreds in the reign of Henry I (1100-1139).