The following is an overview of the events of 2018 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 | 
|---|---|---|
| 6–20 January | 40th Dakar Rally | [1] | 
| 27–28 January | 56th 24 Hours of Daytona | [2] | 
| 5–6 February | 29th Race of Champions | [3] | 
| 18 February | 60th Daytona 500 | [4] | 
| 17 March | 66th 12 Hours of Sebring | [5] | 
| 12–13 May | 46th 24 Hours of Nürburgring | [6] | 
| 27 May | 76th Monaco Grand Prix | [7] | 
| 102nd Indianapolis 500 | [8] | |
| 26 May–8 June | 100th Isle of Man TT | [9] | 
| 16–17 June | 86th 24 Hours of Le Mans | [10] | 
| 28–29 July | 70th 24 Hours of Spa | [11] | 
| 7 October | 61st Bathurst 1000 | [12] | 
| 9–10 November | 17th IFMAR 1:8 IC Off-Road World Championship | [13] | 
| 18 November | 65th Macau Grand Prix | [14] | 
| First race | Championship | Ref | 
|---|---|---|
| 1 April | TCR UK Touring Car Championship | [15] | 
| 7 April | GT4 Belgium | [16] | 
| 8 April | World Touring Car Cup | [17] | 
| 22 April | IFMAR 1:10 Electric Drifting World Cup | [18] | 
| 3 June | GT4 Nordic European Cup | [19] | 
| 14 July | F3 Asian Championship | [20] | 
| 4 August | F3 Americas Championship | [21] | 
| 25 August | TCR Korea Touring Car Championship | [22] | 
| Date | Venue | First event | Ref | 
|---|---|---|---|
| 3 February | Santiago Street Circuit | Santiago ePrix | [23] | 
| 14 April | Circuto Cittadino dell'EUR | Rome ePrix | [24] | 
| Date | Month | Name | Age | Nationality | Occupation | Note | Ref | 
|---|---|---|---|---|---|---|---|
| 13 | January | Erhard "Dallas" Mathiesen | 69 | Swedish | Sport administrator | 3rd president of IFMAR | [25] [26] | 
| 14 | Dan Gurney | 86 | American | Racing driver | Winner of the 24 Hours of Le Mans (1967) | [27] | |
| 27 | Jerry Sneva | 68 | American | Racing driver | 1977 Indianapolis 500 Rookie of the Year | [28] | |
| 10 | March | Ralf Waldmann | 51 | German | Motorcycle rider | Winner of the 20 Grand Prix motorcycle racing events (125cc and 250cc). | [29] | 
| 8 | April | John Miles | 74 | British | Racing driver | [30] | |
| 28 | James Hylton | 83 | American | Racing driver | [31] | ||
| 10 | June | Tom "Mongo$e" McEwen | 81 | American | drag racer | [32] | |
| 25 | July | Sergio Marchionne | 66 | Italian-Canadian | Businessman | The chief executive officer (CEO) of Fiat Chrysler Automobiles, the chairman and CEO of FCA US LLC, the chairman and CEO of Ferrari, and the chairman of Maserati | [33] | 
| 8 | September | Barrie "Whizzo" Williams | 79 | British | Racing driver | [34] | |
| 11 | Don Panoz | 83 | American | Entrepreneur | Panoz LLC, Élan Motorsport Technologies and American Le Mans Series founder | [35] | |
| 23 | Juan Marcos Angelini | 31 | Argentine | Racing driver | Turismo Carretera driver | [36] | |
| 3 | November | Mari Hulman George | 83 | American | Businesswoman | Chairperson of the Indianapolis Motor Speedway | [37] | 
| 12 | David Pearson | 83 | American | Racing driver | Three-time NASCAR Grand National Series champion | [38] |