The following is an overview of the events of 1931 in motorsport including the major racing events, motorsport venues that were opened and closed during a year, championships and non-championship events that were established and disestablished in a year, and births and deaths of racing drivers and other motorsport people.
The calendar includes only annual major non-championship events or annual events that had own significance separate from the championship. For the dates of the championship events see related season articles.
| Date | Event | Ref |
|---|---|---|
| 11–12 April | 5th Mille Miglia | [1] |
| 19 April | 3rd Monaco Grand Prix | [2] |
| 10 May | 22nd Targa Florio | [3] |
| 30 May | 19th Indianapolis 500 | [4] |
| 10–14 June | 20th Isle of Man TT | [5] |
| 13–14 June | 9th 24 Hours of Le Mans | [6] |
| 4–5 July | 8th 24 Hours of Spa | [7] |
| Date | Month | Name | Nationality | Occupation | Note | Ref |
|---|---|---|---|---|---|---|
| 13 | April | Dan Gurney | American | Racing driver | Winner of the 24 Hours of Le Mans (1967). | [8] |
| Date | Month | Name | Age | Nationality | Occupation | Note | Ref |
|---|---|---|---|---|---|---|---|
| 5 | May | Glen Kidston | 31 | British | Racing driver | 24 Hours of Le Mans winner (1930). | [9] |