1998–99 Slovak Superliga
The 1998–99 Slovak Superliga was the sixth season of first-tier football league in Slovakia, since its establishment in 1993. This season started on 1 August 1998 and ended on 29 May 1999. 1. FC Košice are the defending champions.
Teams
A total of 16 teams was contested in the league, including 14 sides from the 1997–98 season and two promoted from the 1. liga.Lokomotíva Košice and FK DAC 1904 Dunajská Streda was relegated to the 1998–99 2. Liga. The two relegated teams were replaced by FC Nitra and ZTS Kerametal Dubnica.
Stadiums and locations
| Team | Home city | Stadium | Capacity |
| 1. HFC Humenné | Humenné | Chemlon Stadion | 10,000 |
| 1. FC Košice | Košice | Lokomotíva Stadium | 9,000 |
| Artmedia Petržalka | Petržalka | Štadión Petržalka | 7,500 |
| BSC JAS Bardejov | Bardejov | Mestský štadión Bardejov | 3,040 |
| Dukla Banská Bystrica | Banská Bystrica | SNP Stadium | 10,000 |
| Inter Slovnaft Bratislava | Bratislava | Štadión Pasienky | 12,000 |
| FC Nitra | Nitra | Štadión pod Zoborom | 11,384 |
| MFK Baník Prievidza | Prievidza | Futbalový štadión Prievidza | 6,000 |
| MFK SCP Ružomberok | Ružomberok | Štadión MFK Ružomberok | 4,817 |
| MŠK Žilina | Žilina | Štadión pod Dubňom | 11,181 |
| Ozeta Dukla Trenčín | Trenčín | Štadión na Sihoti | 4,500 |
| Slovan Bratislava | Bratislava | Tehelné pole | 30,085 |
| Spartak Trnava | Trnava | Štadión Antona Malatinského | 18,448 |
| Tatran Prešov | Prešov | Tatran Štadión | 14,000 |
| Tauris Rimavská Sobota | Rimavská Sobota | Na Zahradkach Stadium | 5,000 |
| ZTS Kerametal Dubnica | Dubnica | Štadión Zimný | 5,450 |