Cock Beck is a stream in the outlying areas of eastern Leeds, West Yorkshire, England, which runs from its source due to a runoff north-west of Whinmoor, skirting east of Swarcliffe and Manston (where a public house has been named 'The Cock Beck'), past Pendas Fields, Scholes, Barwick-in-Elmet, Aberford, Towton, Stutton, and Tadcaster, where it flows into the River Wharfe.

[3] Industrial pollution reduced the fish stock, but it has been recovering in the 21st century, aided by work from the Environment Agency.

[2] Cock Beck is identified as a likely site of the Battle of the Winwaed on 15 November 655, a decisive victory of Oswiu of Bernicia over King Penda of Mercia.

[9] The Cock Beck is now the limit of the heritage protected battlefield site in the Saxton and Towton areas.

[10] During the English Civil War, the Royalists defeated the Parliamentarians under Sir Thomas Fairfax at the Battle of Seacroft Moor in 1643.