Cheshire (archaically the County Palatine of Chester) is a ceremonial county in North West England, in the United Kingdom. The western edge of the county forms part of England's border with Wales. Cheshire's county town is the city of Chester, although the largest town is Warrington, which historically was in Lancashire.

Other major towns include Widnes, Congleton, Crewe, Ellesmere Port, Runcorn, Macclesfield, Winsford, Northwich, and Wilmslow.

Historically the county contained the Wirral, Stockport, Sale, Altrincham and other towns. The county is bordered by Merseyside and Greater Manchester to the north, Derbyshire to the east, Staffordshire and Shropshire to the south, and Flintshire and Wrexham in Wales to the west. Cheshire is also a part of the Welsh Marches.

Cheshire's area is 2,343 square kilometres (905 sq mi) and its population is around 1 million. Apart from the large towns along the River Mersey and the historic city of Chester, it is mostly rural, with a number of small towns and villages that support an agricultural industry. It is historically famous as a former principality and for the production of Cheshire cheese, salt, bulk chemicals, and woven silk.