The following is an overview of the events of 1978 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 significance separate from the championship. For the dates of the championship events see related season articles.
| Date | Event | Ref |
|---|---|---|
| 4–5 February | 16th 24 Hours of Daytona | [1] |
| 12 February | 1978 NHRA Winternationals | [2] |
| 19 February | 20th Daytona 500 | [3] |
| 7 May | 36th Monaco Grand Prix | [4] |
| 28 May | 62nd Indianapolis 500 | [5] |
| 1–9 June | 60th Isle of Man TT | [6] |
| 10–11 June | 46th 24 Hours of Le Mans | [7] |
| 16 July | 1978 NHRA Summernationals | [8] |
| 22–23 July | 30th 24 Hours of Spa | [9] |
| 30 July | 1st Suzuka 8 Hours | [10] |
| 1 October | 19th Hardie-Ferodo 1000 | [11] |
| 7–8 October | 7th 24 Hours of Nurburgring | [12] |
| 19 November | 25th Macau Grand Prix | [13] |
| Date | Month | Name | Nationality | Occupation | Note | Ref |
|---|---|---|---|---|---|---|
| 22 | June | Dan Wheldon | British | Racing driver | Indianapolis 500 winner (2005, 2011). | [14] |
| 14 | July | Mattias Ekström | Swedish | Racing driver | FIA World Rallycross champion (2016). | [15] |
| Date | Month | Name | Age | Nationality | Occupation | Note | Ref |
|---|---|---|---|---|---|---|---|
| 11 | September | Ronnie Peterson | 34 | Swedish | Racing driver | 10-time Grand Prix Winner | |
| 20 | October | Gunnar Nilsson | 29 | Swedish | Racing driver | 1977 Belgian Grand Prix winner. | [16] |