| Country: | United Kingdom |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1859 United Kingdom general election in Ireland |
| Previous Year: | 1859 |
| Previous Mps: | List of MPs elected in the 1859 United Kingdom general election |
| Next Election: | 1868 United Kingdom general election in Ireland |
| Next Year: | 1868 |
| Seats For Election: | 105 of the 658 seats to the House of Commons |
| Elected Mps: | List of MPs elected in the 1865 United Kingdom general election |
| Leader1: | Viscount Palmerston |
| Leader Since1: | 6 February 1855 |
| Party1: | Liberal Party (UK) |
| Leaders Seat1: | Tiverton |
| Seats Before1: | 50 |
| Seats1: | 58 |
| Seat Change1: | 8 |
| Popular Vote1: | 51,532 |
| Percentage1: | 55.6% |
| Swing1: | 5.5% |
| Leader2: | Earl of Derby |
| Leader Since2: | July 1846 |
| Party2: | Conservative Party (UK) |
| Leaders Seat2: | House of Lords |
| Seats Before2: | 55 |
| Seats2: | 47 |
| Seat Change2: | 8 |
| Popular Vote2: | 41,497 |
| Percentage2: | 44.4% |
| Swing2: | 5.5% |
| Map Size: | 300px |
The 1865 United Kingdom general election in Ireland took place in July 1865. It was the first election contested by the new Liberal Party. In Ireland, the Liberals increased their seat total. This composed the greater part of the increase of 13 seats for the Liberals led by Viscount Palmerston in the United Kingdom election as a whole, after which they stayed in office. Palmerston died later that year and was succeeded as prime minister by Earl Russell.
| Party | Candidates | Unopposed | Seats | Seats change | Votes | % | % Change | |
|---|---|---|---|---|---|---|---|---|
| 83 | 28 | 58 | 8 | 51,532 | 55.6 | 5.5 | ||
| 61 | 27 | 47 | 8 | 41,497 | 44.4 | 5.5 | ||
| Total | 142 | 55 | 105 | 93,029 | 100 |
The vote total does not include the result from Dublin University