Chelsea was a borough constituency, represented in the House of Commons of the Parliament of the United Kingdom. The constituency was created by the Reform Act 1867 for the 1868 general election, when it returned two Members of Parliament (MPs), elected by the bloc vote system of election. Under the Redistribution of Seats Act 1885, with effect from the 1885 general election, its representation was reduced to one MP, elected by the first past the post system.