Isle of Ely was a county constituency represented in the House of Commons of the Parliament of the United Kingdom, centred on the Isle of Ely in Cambridgeshire. Until its abolition in 1983, it elected one Member of Parliament (MP) by the first past the post system of election.

Newmarket is a former United Kingdom Parliamentary constituency. It was created upon the splitting up of the three member Cambridgeshire constituency into three single member divisions in 1885. The seat was abolished in 1918.