The River Okement is a tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the River Torridge

River Torridge

The River Torridge is a river in Devon in England. It was the home of Tarka the Otter in Henry Williamson's book. The Torridge local government district is named after the river....

 in Devon

Devon

Devon is a large county in southwestern England. The county is sometimes referred to as Devonshire, although the term is rarely used inside the county itself as the county has never been officially "shired", it often indicates a traditional or historical context.The county shares borders with...

, England. It was formerly known as the River Ock.

It rises at two places in Dartmoor

Dartmoor

Dartmoor is an area of moorland in south Devon, England. Protected by National Park status, it covers .The granite upland dates from the Carboniferous period of geological history. The moorland is capped with many exposed granite hilltops known as tors, providing habitats for Dartmoor wildlife. The...

, as the West Okement and the East Okement. These meet with other minor streams and join together at Okehampton

Okehampton

Okehampton is a town and civil parish in West Devon in the English county of Devon. It is situated at the northern edge of Dartmoor, and has an estimated population of 7,155.-History:...

. The river flows generally north, past the villages of Jacobstowe

Jacobstowe

Jacobstowe is a village and civil parish in the West Devon district of Devon in England. According to the 2001 census it had a population of 118. The village is on the River Okement, about 5 miles north of Okehampton.-Trivia:...

 and Monkokehampton, and has its confluence with the River Torridge near Meeth.