The United Kingdom general election of 2010 was held on Thursday 6 May 2010 to elect members to the House of Commons. The election took place in 650 constituencies across the United Kingdom under the first-past-the-post system. None of the parties achieved the 326 seats needed for an overall majority. The Conservative Party, led by David Cameron, won the largest number of votes and seats but still fell twenty seats short. This resulted in a hung parliament where no party was able to command a majority in the House of Commons. This was only the second general election since World War II to return a hung parliament, the first being the February 1974 election. Unlike in 1974, the potential for a hung parliament had this time been widely considered and predicted and both the country and politicians were better prepared for the constitutional process that would follow such a result. The coalition government that was subsequently formed was the first coalition in British history to eventuate directly from an election outcome.

The United Kingdom of Great Britain and Northern Ireland (commonly known as the United Kingdom, the UK, or Britain) is a sovereign state located off the north-western coast of continental Europe. The country includes the island of Great Britain, the north-eastern part of the island of Ireland and many smaller islands. Northern Ireland is the only part of the UK that shares a land border with another sovereign state—the Republic of Ireland. Apart from this land border the UK is surrounded by the Atlantic Ocean, the North Sea, the English Channel and the Irish Sea.

The United Kingdom is a unitary state governed under a constitutional monarchy and a parliamentary system, with its seat of government in the capital city of London. It is a country in its own right and consists of four countries: England, Northern Ireland, Scotland and Wales. There are three devolved administrations, each with varying powers, based in Belfast, Edinburgh and Cardiff, the capitals of Northern Ireland, Scotland, and Wales. Associated with the UK, but not constitutionally part of it, are three Crown Dependencies. The United Kingdom has fourteen overseas territories. These are remnants of the British Empire which, at its height in 1922, encompassed almost a quarter of the world's land surface and was the largest empire in history. British influence can still be observed in the language, culture and legal systems of many of its former territories.

2010 general election may refer to:

This national electoral calendar for the year 2010 lists the national/federal direct elections held in 2010 in all sovereign states and their dependent territories. Referenda are included, even though they are not elections. By-elections are not included.