1981 in motorsport
The following is an overview of the events of 1981 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.
Annual events
The calendar includes only annual major non-championship events or annual events that had significance separate from the championship. For the dates of the championship events see related season articles.| Date | Event | Ref |
| 1–20 January | 3rd Dakar Rally | |
| 31 January-1 February | 19th 24 Hours of Daytona | |
| 15 February | 23rd Daytona 500 | |
| 24 May | 65th Indianapolis 500 | |
| 31 May | 39th Monaco Grand Prix | |
| 6–11 June | 64th Isle of Man TT | |
| 13–14 June | 49th 24 Hours of Le Mans | |
| 3–4 October | 10th 24 Hours of Nurburgring | |
| 25–26 July | 33rd 24 Hours of Spa | |
| 26 July | 4th Suzuka 8 Hours | |
| 5 October | 22nd James Hardie 1000 | |
| 15 November | 28th Macau Grand Prix |