The Cheshire Building Society was a building society based in Macclesfield, Cheshire, England. It was the 11th largest building society in the United Kingdom based on total assets of £5 billion on 31 December 2007, prior to merging with the Nationwide Building Society, and was a member of the Building Societies Association. The Cheshire was acquired by Nationwide on 15 December 2008, which was as a result of its approach to the Nationwide in September 2008 regarding a possible merger due to its financial position.