| Election Name: | January 1910 United Kingdom general election |
| Country: | United Kingdom of Great Britain and Ireland |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1906 United Kingdom general election |
| Previous Year: | 1906 |
| Previous Mps: | List of MPs elected in the United Kingdom general election, 1906 |
| Next Election: | December 1910 United Kingdom general election |
| Next Year: | Dec 1910 |
| Seats For Election: | All 670 seats in the House of Commons |
| Majority Seats: | 336 |
| Elected Mps: | List of MPs elected in the United Kingdom general election, January 1910 |
| Leader1: | H. H. Asquith |
| Leader Since1: | 30 April 1908 |
| Party1: | Liberal Party (UK) |
| Leaders Seat1: | East Fife |
| Last Election1: | 397 seats, 48.9% |
| Seats1: | 274 |
| Seat Change1: | 123 |
| Popular Vote1: | 2,712,511 |
| Percentage1: | 43.5% |
| Swing1: | 5.4% |
| Leader2: | Arthur Balfour |
| Leader Since2: | 11 June 1902 |
| Party2: | Conservative and Liberal Unionist |
| Leaders Seat2: | City of London |
| Last Election2: | 156 seats, 43.4% |
| Seats2: | 272 |
| Seat Change2: | 116 |
| Popular Vote2: | 2,919,236 |
| Percentage2: | 46.8% |
| Swing2: | 3.4% |
| Leader3: | John Redmond |
| Leader Since3: | 6 February 1900 |
| Party3: | Irish Parliamentary Party |
| Leaders Seat3: | Waterford City |
| Last Election3: | 82 seats, 0.6% |
| Seats3: | 71 |
| Seat Change3: | 11 |
| Popular Vote3: | 74,047 |
| Percentage3: | 1.2% |
| Swing3: | 0.6% |
| Leader4: | Arthur Henderson |
| Leader Since4: | 22 January 1908 |
| Party4: | Labour Party (UK) |
| Leaders Seat4: | Barnard Castle |
| Last Election4: | 29 seats, 4.8% |
| Seats4: | 40 |
| Seat Change4: | 11 |
| Popular Vote4: | 435,770 |
| Percentage4: | 7.0% |
| Swing4: | 2.2% |
| Leader5: | William O'Brien |
| Leader Since5: | March 1909 |
| Party5: | All-for-Ireland League |
| Leaders Seat5: | North East Cork |
| Last Election5: | Did not contest |
| Seats5: | 8 |
| Seat Change5: | 8 |
| Popular Vote5: | 23,605 |
| Percentage5: | 0.4% |
| Swing5: | 0.4% |
| Map Size: | 400px |
| Prime Minister | |
| Posttitle: | Prime Minister after election |
| Before Election: | H. H. Asquith |
| Before Party: | Liberal Party (UK) |
| After Election: | H. H. Asquith |
| After Party: | Liberal Party (UK) |
| Turnout: | 86.8% |
| Map2 Image: | File:Jan 1910 UK GE Composition.svg |
| Map2 Caption: | Composition of the House of Commons following the election. |
The January 1910 United Kingdom general election was held from 15 January to 10 February 1910. The government called the election in the midst of a constitutional crisis caused by the rejection of the People's Budget by the Conservative-dominated House of Lords, in order to get a mandate to pass the budget.
The general election resulted in a hung parliament, with the Conservative Party led by Arthur Balfour and their Liberal Unionist allies receiving the most votes, but the Liberals, who were now led by H. H. Asquith following the death of Henry Campbell-Bannerman in 1908, winning the most seats, returning two more MPs than the Conservatives. Asquith's government remained in power with the support of the Irish Parliamentary Party, led by John Redmond. Another general election was soon held in December.
The Labour Party, led by Arthur Henderson, returned 40 MPs. Much of this apparent increase (from the 29 Labour MPs elected in 1906) came from the defection, a few years earlier, of Lib Lab MPs from the Liberal Party to Labour.
|}