| Election Name: | 1994 Eastleigh by-election |
| Type: | parliamentary |
| Election Date: | 9 June 1994 |
| Ongoing: | No |
| Party1: | Liberal Democrats (UK) |
| Candidate1: | David Chidgey |
| Popular Vote1: | 24,473 |
| Percentage1: | 44.3% |
| Swing1: | 16.3% |
| Party2: | Labour Party (UK) |
| Candidate2: | Marilyn Birks |
| Popular Vote2: | 15,234 |
| Percentage2: | 27.6% |
| Swing2: | 6.8% |
| Image3: | Con |
| Party3: | Conservative Party (UK) |
| Candidate3: | Stephen Reid |
| Popular Vote3: | 13,675 |
| Percentage3: | 24.7% |
| Swing3: | 26.5% |
| MP | |
| After Election: | David Chidgey |
| Before Party: | Conservative Party (UK) |
| Before Election: | Stephen Milligan |
| Country: | United Kingdom |
| Next Election: | 1997 United Kingdom general election |
| Previous Year: | 1992 |
| Previous Election: | 1992 United Kingdom general election |
| Next Year: | 1997 |
| After Party: | Liberal Democrats (UK) |
| Turnout: | 58.7% (24.2%) |
The 1994 Eastleigh by-election was a parliamentary by-election held on 9 June 1994 for the United Kingdom House of Commons constituency of Eastleigh in Hampshire. The seat had fallen vacant because of the death of Conservative Party Member of Parliament (MP) Stephen Milligan on 7 February.[1]
The result of the election was a gain for the Liberal Democrats on a large swing. A disastrous result for the Conservative Party saw them fall to third place.[2] The election, along with the EU elections and three other by-elections held that day, were the first election that the newly formed UK Independence Party (UKIP) stood in, with Nigel Farage as the candidate; Farage went on to become the leader of UKIP in 2006. He would later win election to the constituency of Clacton in Essex in 2024 as leader of Reform UK, formerly the Brexit Party.