| Type: | by-election |
| Country: | Barbados |
| Turnout: | 73.8% |
| Previous Election: | 1986 Barbadian general election |
| Previous Year: | 1986 |
| Next Election: | 1991 Barbadian general election |
| Next Year: | 1991 |
| Election Date: | 16 July 1987 |
| Candidate1: | David Thompson |
| Image1: | David John Howard Thompson - World Economic Forum on Latin America 2010 (cropped).jpg |
| Party1: | Democratic Labour Party (Barbados) |
| Popular Vote1: | 4,108 |
| Percentage1: | 86.39% |
| Candidate2: | Hutson Linton |
| Party2: | Barbados Labour Party |
| Popular Vote2: | 544 |
| Percentage2: | 11.44% |
| MP | |
| Before Election: | Errol Barrow |
| Before Party: | Democratic Labour Party (Barbados) |
| After Election: | David Thompson |
| After Party: | Democratic Labour Party (Barbados) |
A by-election was held in the Barbadian constituency of the St. John on 16 July 1987 after the death of the first prime minister of Barbados Errol Barrow. He was a Democratic Labour Party member and the representative of the constituency in the House of Assembly of Barbados.[1]
David Thompson won the election in a landslide victory. Turnout was 73.8%.