Coordinates: 52°34′16″N 3°02′20″W / 52.571°N 3.039°W / 52.571; -3.039

The River Onny, seen downstream from Horderley Bridge
The River Onny, seen downstream from Horderley Bridge

The River Onny is a river in Shropshire, England. It is a major tributary of the River Teme.


The river's name derives from Welsh and means the river on which ash trees (Welsh: onnau) grew.[1]


The river has its sources in the Shropshire Hills at White Grit,[2] located in Mid and South-west Shropshire. It has two branches, the East Onny and West Onny, which converge at Eaton, to the east of Lydham. The River Onny then flows in a south-easterly direction, through Craven Arms and Onibury (a village it gives its name to),[1] before it finally has its confluence with the River Teme just upstream of Ludlow at Bromfield.[3] From White Grit to Bromfield, the river flows over a distance of 25 miles (40 km).[4][5]

The River Teme is itself a tributary of the River Severn, confluencing just south of Worcester city centre. The River Severn then flows south-west meeting the sea at Bristol Channel.[6]


Geologically, the Onny has the type section just west of Craven Arms of the Caradoc series of the Ordovician system and there is a trilobite genus Onnia which was first defined here.[7]


  1. ^ a b Ekwall 1974, p. 350.
  2. ^ "Shropshire Watercourses". Retrieved 4 March 2017.
  3. ^ 52°23′17″N 2°45′50″W / 52.388°N 2.764°W / 52.388; -2.764
  4. ^ "Onny - conf R E Onny to conf R Teme". Environment Agency. Retrieved 4 March 2017.
  5. ^ "Onny - source to conf R E Onny". Environment Agency. Retrieved 4 March 2017.
  6. ^ Collins Britain Big Road Atlas 2009 (Map). 1:200,000. Collins Bartholomew. 2008. pp. 78–79. ISBN 978-0-00-727240-2.
  7. ^ "Onny River Section" (PDF). Retrieved 4 March 2017.