 | December | Vodacom ISRS 1998
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round 08, South Africa, 4 - 6 December 1998
Vodacom ISRS held on 4 - 6 December 1998 at Kyalami Grand Prix Circuit in South Africa with nineteen entries and results as part of 1998 International Sports Racing Series. | More |
 | November | Vallelunga 6 Hours 1998
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round 05, Italy, 15 November 1998
Vallelunga 6 Hours held on 15 November 1998 at ACI Vallelunga Circuit in Italy with five entries and results as part of 1998 Campionato Italiano Supercar GT. | More |
 | October | Fuji Television Japanese Grand Prix 1998
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round 16, Japan, 30 October - 1 November 1998
Fuji Television Japanese Grand Prix held on 30 October - 1 November 1998 at Suzuka International Racing Course in Japan with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
 | October | Visa Sports Car Championships 1998
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round 10, United States, 23 - 25 October 1998
Visa Sports Car Championships held on 23 - 25 October 1998 at Laguna Seca in United States with twenty nine entries and results as part of 1998 FIA GT Championship. | More |
| October | Homestead 500km 1998
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round 09, United States, 17 - 18 October 1998
Homestead 500km held on 17 - 18 October 1998 at Homestead-Miami Speedway in United States with twenty seven entries and results as part of 1998 FIA GT Championship. | More |
 | September | Grosser Warsteiner Preis von Luxemburg 1998
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round 15, Luxembourg, 25 - 27 September 1998
Grosser Warsteiner Preis von Luxemburg held on 25 - 27 September 1998 at Nurburgring in Luxembourg with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
 | September | Coupe d'Automne 1998
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round 07, France, 19 - 20 September 1998
Coupe d'Automne held on 19 - 20 September 1998 at Circuit permanent Bugatti in France with twenty six entries and results as part of 1998 International Sports Racing Series. | More |
 | September | Zeltweg 500km 1998
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round 08, Austria, 18 - 20 September 1998
Zeltweg 500km held on 18 - 20 September 1998 at A1-Ring in Austria with thirty entries and results as part of 1998 FIA GT Championship. | More |
| September | 69. Gran Premio Campari d'Italia
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round 14, Italy, 11 - 13 September 1998
69. Gran Premio Campari d'Italia held on 11 - 13 September 1998 at Autodromo Nazionale di Monza in Italy with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
 | September | DMC-ADAC Sportwagen Festival 1998
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round 06, Germany, 4 - 6 September 1998
DMC-ADAC Sportwagen Festival held on 4 - 6 September 1998 at Nurburgring in Germany with twenty five entries and results as part of 1998 International Sports Racing Series. | More |
 | September | Donington 500km 1998
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round 07, United Kingdom, 4 - 6 September 1998
Donington 500km held on 4 - 6 September 1998 at Donington Park Racing Circuit in United Kingdom with twenty eight entries and results as part of 1998 FIA GT Championship. | More |
 | August | Foster's Grand Prix de Belgique 1998
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round 13, Belgium, 28 - 30 August 1998
Foster's Grand Prix de Belgique held on 28 - 30 August 1998 at Circuit de Spa-Francorchamps in Belgium with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| August | Suzuka 1000km 1998
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round 06, Japan, 21 - 23 August 1998
Suzuka 1000km held on 21 - 23 August 1998 at Suzuka International Racing Course in Japan with twenty three entries and results as part of 1998 FIA GT Championship. | More |
 | August | Sweden, 15 - 16 August 1998
International Sports Racing Series Anderstorp held on 15 - 16 August 1998 at Scandinavian Raceway in Sweden with seventeen entries and results as part of 1998 International Sports Racing Series. | More |
 | August | Marlboro Magyar Nagydij 1998
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round 12, Hungary, 14 - 16 August 1998
Marlboro Magyar Nagydij held on 14 - 16 August 1998 at Hungaroring in Hungary with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| July | Grosser Mobil 1 Preis von Deutschland 1998
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round 11, Germany, 31 July - 2 August 1998
Grosser Mobil 1 Preis von Deutschland held on 31 July - 2 August 1998 at Hockenheimring in Germany with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| July | Grosser Preis von Osterreich 1998
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round 10, Austria, 24 - 26 July 1998
Grosser Preis von Osterreich held on 24 - 26 July 1998 at A1-Ring in Austria with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| July | RAC Tourist Trophy 1998
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round 04, United Kingdom, 18 - 19 July 1998
RAC Tourist Trophy held on 18 - 19 July 1998 at Donington Park Racing Circuit in United Kingdom with twenty two entries and results as part of 1998 International Sports Racing Series. | More |
| July | Budapest 500km 1998
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round 05, Hungary, 17 - 19 July 1998
Budapest 500km held on 17 - 19 July 1998 at Hungaroring in Hungary with thirty two entries and results as part of 1998 FIA GT Championship. | More |
| July | Dijon 500km 1998
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round 04, France, 11 - 12 July 1998
Dijon 500km held on 11 - 12 July 1998 at Circuit de Dijon-Prenois in France with twenty eight entries and results as part of 1998 FIA GT Championship. | More |
| July | RAC British Grand Prix 1998
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round 09, United Kingdom, 10 - 12 July 1998
RAC British Grand Prix held on 10 - 12 July 1998 at Silverstone Circuit in United Kingdom with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| July | Giesse ISRS Trophy 1998
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round 03, Italy, 4 - 5 July 1998
Giesse ISRS Trophy held on 4 - 5 July 1998 at Autodromo Internazionale 'Santa Monica' di Misano Adriatico in Italy with twenty four entries and results as part of 1998 International Sports Racing Series. | More |
| June | Grand Prix Mobil 1 de France 1998
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round 08, France, 26 - 28 June 1998
Grand Prix Mobil 1 de France held on 26 - 28 June 1998 at Circuit de Nevers-Magny Cours in France with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| June | Hockenheim 500km 1998
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round 03, Germany, 26 - 28 June 1998
Hockenheim 500km held on 26 - 28 June 1998 at Hockenheimring in Germany with thirty entries and results as part of 1998 FIA GT Championship. | More |
| June | Zeltweg 2 Hours 1998
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round 04, Belgium, 21 June 1998
Zeltweg 2 Hours held on 21 June 1998 at A1-Ring in Belgium as part of 1998 Campionato Italiano Supercar GT. | |
| June | France, 6 - 7 June 1998
66. edition des 24 Heures du Mans held on 6 - 7 June 1998 at Circuit de la Sarthe in France with fourty seven entries and results. | More |
 | June | Grand Prix Player's du Canada 1998
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round 07, Canada, 5 - 7 June 1998
Grand Prix Player's du Canada held on 5 - 7 June 1998 at Circuit Gilles Villeneuve in Canada with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| May | Misano 6 Hours 1998
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round 03, Italy, 23 May 1998
Misano 6 Hours held on 23 May 1998 at Autodromo Internazionale 'Santa Monica' di Misano Adriatico in Italy as part of 1998 Campionato Italiano Supercar GT. | |
 | May | Grand Prix de Monaco 1998
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round 06, Monaco, 21 - 24 May 1998
Grand Prix de Monaco held on 21 - 24 May 1998 at Circuit de Monaco in Monaco with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
 | May | Brno 2.5 hour 1998
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round 02, Czech Republic, 16 - 17 May 1998
Brno 2.5 hour held on 16 - 17 May 1998 at Automotodrom Masaryk in Czech Republic with eighteen entries and results as part of 1998 International Sports Racing Series. | More |
| May | British Empire Trophy 1998
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round 02, United Kingdom, 15 - 17 May 1998
British Empire Trophy held on 15 - 17 May 1998 at Silverstone Circuit in United Kingdom with twenty nine entries and results as part of 1998 FIA GT Championship. | More |
| May | Italy, 13 - 16 May 1998
Mille Miglia held on 13 - 16 May 1998 in Italy with thirty six entries. | More |
 | May | Gran Premio Marlboro de Espana 1998
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round 05, Spain, 8 - 10 May 1998
Gran Premio Marlboro de Espana held on 8 - 10 May 1998 at Circuit de Catalunya in Spain with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| May | France, 3 May 1998
Essais Preliminaires des 24 Heures du Mans 1998 held on 3 May 1998 at Circuit de la Sarthe in France with four entries and results. | More |
| April | Paul Ricard 4 Hours 1998
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round 02, France, 26 April 1998
Paul Ricard 4 Hours held on 26 April 1998 at ASA Circuit Paul Ricard, Circuit du Castellet in France as part of 1998 Campionato Italiano Supercar GT. | |
 | April | 18. Gran Premio di San Marino
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round 04, San Marino, 24 - 26 April 1998
18. Gran Premio di San Marino held on 24 - 26 April 1998 at Autodromo Enzo e Dino Ferrari in San Marino with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| April | France, 14 - 18 April 1998
Tour Auto held on 14 - 18 April 1998 in France with two hundred fourteen entries and results. | More |
| April | France, 11 - 13 April 1998
International Sports Racing Series Paul Ricard held on 11 - 13 April 1998 at ASA Circuit Paul Ricard, Circuit du Castellet in France with fifteen entries and results as part of 1998 International Sports Racing Series. | More |
 | April | Gran Premio Marlboro de Argentina 1998
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round 03, Argentina, 10 - 12 April 1998
Gran Premio Marlboro de Argentina held on 10 - 12 April 1998 at Autodromo Juan y Oscar Alferedo Galvez in Argentina with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
| April | Oschersleben 500km 1998
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round 01, Germany, 10 - 12 April 1998
Oschersleben 500km held on 10 - 12 April 1998 at Motorsport Arena Oschersleben in Germany with twenty six entries and results as part of 1998 FIA GT Championship. | More |
| March | Monza 1000km 1998
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round 01, Italy, 29 March 1998
Monza 1000km held on 29 March 1998 at Autodromo Nazionale di Monza in Italy with six entries and results as part of 1998 Campionato Italiano Supercar GT. | More |
 | March | Grande Premio do Brasil 1998
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round 02, Brazil, 27 - 29 March 1998
Grande Premio do Brasil held on 27 - 29 March 1998 at Autodromo Jose Carlos Pace in Brazil with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |
 | March | Qantas Australian Grand Prix 1998
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round 01, Australia, 5 - 8 March 1998
Qantas Australian Grand Prix held on 5 - 8 March 1998 at Albert Park Grand Prix Circuit in Australia with twenty two entries and results as part of 1998 FIA Formula One World Championship. | More |