1998 Swedish Touring Car Championship
The 1998 Swedish Touring Car Championship season was the 3rd Swedish Touring Car Championship season. It was decided over six race weekends at five different circuits.
Fredrik Ekblom won his first championship for the BMW Dealer Team.
Entry list
| Team | Car | Drivers | Class | Rounds | |
| Flash Engineering | Volvo S40 | 1 |  Jan Nilsson | D | All |
| Flash Engineering | Volvo S40 | 12 | Jens Edman | D | 3–6 |
| Flash Engineering | Volvo 850 GLT | 15 | Patrick Ernstson | D | 6 |
| Troberg-Rydell Junior Team | Ford Mondeo Ghia | 2 | Mattias Ekström | D | All |
| Opel Motorsport | Opel Vectra 16v | 3 | Thomas Johansson | D | All |
| Opel Motorsport | Opel Vectra 16v | 6 | Jan Brunstedt | D | All |
| Opel Motorsport | Opel Vectra 16v | 37 | Pontus Mörth | S | All |
| BMW Dealer Team | BMW 320i | 4 | Peggen Andersson | D | All |
| BMW Dealer Team | BMW 320i | 11 | Fredrik Ekblom | D | All |
| Mobil Ford Motorsport | Ford Mondeo Ghia | 5 | Stig Blomqvist | D | All |
| Mobil Ford Motorsport | Ford Mondeo Ghia | 38 | Anders Söderberg | D | 1–5 |
| Elgh Motorsport | Nissan Primera GT | 13 | Carl Rosenblad | D | All |
| Team 13 | Honda Accord | 16 | Stefan Lindberg | D | All |
| Euroracing AB | Nissan Primera eGT | 20 |  Kari Makinen | S | All |
| Bakajev Motorsport | BMW 318is | 21 | Georg Bakajev | S | All |
| Ikegami Motorsport | BMW 318is | 22 | Niklas Danielsson | S | 1–4 |
| Lennart Lindqvist Racing | BMW 318is | 23 | Lennart Lindqvist | S | All |
| Kristoffersson Motorsport | Audi A4 Quattro | 25 | Tommy Kristoffersson | D | All |
| Kristoffersson Motorsport | Audi A4 Quattro | 26 | Mats Lindén | D | All |
| Blue Jeans Powerdrink | Ford Mondeo Ghia | 27 | Richard Göransson | S | 1–3 |
| Ross Racing | Ford Mondeo Ghia | 28 | Nettan Lindgren-Jansson | S | 1–4, 6 |
| Nordic Miltronic Motorsport | Opel Vectra GT | 29 | Rolf Uhr | S | All |
| Anders Svensson | BMW 318is | 30 | Anders Svensson | S | All |
| Polaris Auto | BMW 318is | 31 |  Tönu Soomer | S | All |
| Polaris Auto | BMW 318is | 32 | Anders Bergman | S | All |
| Kim Esbjug | BMW 318is | 33 |  Kim Esbjug | S | All |
| Östfold Fina Olje | BMW 318is | 34 | Simen Tvete | D | 4 |
| Tord Linnerud | Opel Vectra GT | 37 | Tord Linnerud | S | 1, 6 |
Race calendar and winners
All rounds were held in Sweden.Championship standings
Drivers' Championship
Points were awarded to the top ten drivers in a race as follows: 20, 15, 12, 10, 8, 6, 4, 3, 2, 1.5 points were awarded to any driver who took part in qualifying.
Top 6 finishers in Race 1 were reversed to decide the Race 2 grid.
The final meeting of the year saw double points awarded.