| Honorific-Prefix: | The Honourable |
| David Arnot | |
| Office: | Canadian Senator from Saskatchewan |
| Nominator: | Justin Trudeau |
| Appointer: | Mary Simon |
| Term Start: | July 29, 2021 |
| Predecessor: | David Tkachuk |
| Party: | Independent Senators Group |
| Birth Date: | 16 April 1952 |
| Birth Place: | Brandon, Manitoba, Canada |
| Alma Mater: | University of Saskatchewan (JD) |
David M. Arnot[1] is a Canadian senator from Saskatchewan, serving since July 2021. A lawyer and judge, Arnot previously served as the chief commissioner of the Saskatchewan Human Rights Commission since 2009, and was previously a judge on the provincial court, federal treaty commissioner (1997 to 2007), and crown prosecutor.[2] He is a graduate of the University of Saskatchewan and was admitted to the bar in 1976.[3] On July 29, 2021, it was announced that he would be appointed to the Senate of Canada by Governor General Mary Simon, on the advice of prime minister Justin Trudeau.[4]