This is a list of members of Parliament (MPs) elected to the House of Commons at the 2001 general election, held on 7 June. The list is arranged by constituency. New MPs elected since the general election and changes in party allegiance are noted at the bottom of the page. Notable newcomers to the House of Commons included David Cameron, David Miliband, Boris Johnson, John Thurso, George Osborne, Nigel Dodds, Chris Grayling, Andy Burnham, Adam Price, Alistair Carmichael, Angus Robertson, Chris Bryant, Norman Lamb, and Tom Watson (many of whom would go on to reach senior positions in government and/or their respective parties). During the 2001–05 Parliament, Michael Martin was the Speaker, Tony Blair served as Prime Minister, and William Hague, Iain Duncan Smith and Michael Howard served as Leader of the Opposition. This Parliament was dissolved on 11 April 2005.

By nation

Composition

These representative diagrams show the composition of the parties in the 2001 general election. Note: The Scottish National Party and Plaid Cymru sat together as a party group, while Sinn Féin did not take its seats. This is not the official seating plan of the House of Commons, which has five rows of benches on each side, with the government party to the right of the speaker and opposition parties to the left, but with room for only around two-thirds of MPs to sit at any one time. The effective government majority was slightly higher because Sinn Féin members did not take up their seats and the speaker does not vote. Speaker Michael Martin technically represented Labour in a notional majority. {| class="wikitable" id="elected-mps"

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By-elections

There were six by-elections in the 2001–2005 Parliament. Each were in seats held by the governing Labour party, four of which were held and two won by the Liberal Democrats. Four by-elections were a result of the death of the incumbent MP.

Defections, Suspensions and Resignations

2001

2002

2003

2004

2005