Cold Brayfield is a village in the County of Milton Keynes, England, though before the administrative boundary change in 1995 it was in Buckinghamshire. It is located about three miles east of Olney, on the Bedfordshire border.

The village name is from both modern and old English. The affix 'Cold' refers to the village's bleak location on the banks of the River Ouse. The last part 'Brayfield' means 'open land by higher ground' and was referred to in the Anglo_Saxon Chronicle of 967 as Bragenfelda.

Anciently the manor of Brayfield belonged to the Blossomville family of nearby Newton Blossomville.