Cambridgeshire (abbreviated Cambs) is a county in England, bordering Lincolnshire to the north, Norfolk to the northeast, Suffolk to the east, Essex and Hertfordshire to the south, and Bedfordshire and Northamptonshire to the west. Cambridgeshire contains most of the region known as Silicon Fen. The county town is Cambridge.

Cambridgeshire is a former United Kingdom Parliamentary constituency. It was a constituency of the House of Commons of the Parliament of England then of the Parliament of Great Britain from 1707 to 1800 and of the Parliament of the United Kingdom from 1801 to 1885. It was represented by two Knights of the Shire until 1832, when the number of members was increased to three.