Wilmslow is a market town and civil parish in Cheshire, England. It is 11 mi south of Manchester and within the unitary authority of Cheshire East…Wilmslow is a market town and civil parish in Cheshire, England. It is 11 mi south of Manchester and within the unitary authority of Cheshire East. The population was 24,497 at the 2011 Census. Wilmslow derives its name from Old English Wīghelmes hlāw = "mound of a man called Wīghelm."