Marylebone (sometimes written St. Marylebone or Mary-le-bone) is an area of central London in the City of Westminster. It is commonly pronounced as Mar(i)-lee-bone , however according to the local Marylebone Association the correct pronunciation is Mar'l-e-b'n .

Marylebone was a two seat constituency in the House of Commons of the Parliament of the United Kingdom created under the Reform Act 1832 and divided under the Redistribution of Seats Act, 1885 into two single member divisions (see below for details).