| Previous Election: | 1988 Canadian federal election |
| Previous Year: | 1988 |
| Next Election: | 1993 Canadian federal election |
| Popular Vote1: | 17,332 |
| Next Year: | 1993 |
| Seats For Election: | Riding of Beauséjour |
| Party Colour: | no |
| Candidate1: | Jean Chrétien |
| Election Name: | 1990 Beauséjour federal by-election |
| Popular Vote3: | 2,783 |
| Percentage3: | 8.26% |
| Image3: | CoR |
| Party Name: | no |
| Ongoing: | no |
| Candidate2: | Guy Cormier |
| Popular Vote2: | 12,587 |
| Percentage2: | 37.37% |
| Swing2: | 27.12pp |
| Map Size: | 200px |
| Swing1: | 7.16pp |
| MP | |
| Type: | Parliamentary |
| Posttitle: | Elected MP |
| Before Election: | Fernand Robichaud |
| After Election: | Jean Chrétien |
| Percentage1: | 51.45% |
| Country: | Canada |
| Candidate3: | Margie Bowes-Legood |
| Swing3: | 4.37pp |
A by-election was held in the federal riding of Beauséjour in New Brunswick on December 10, 1990, following the resignation of Liberal MP Fernand Robichaud.
The by-election was held on the same day as another in York North in Ontario. The seat was held for the Liberals by Jean Chrétien who had been elected leader of the Liberal Party of Canada.[1]
In the 1993 Canadian federal election, Chrétien was elected in Saint-Maurice, Quebec and became the 20th Prime Minister of Canada.