1998–99 Slovak Superliga
| Season | 1998–99 |
|---|---|
| Dates | 1 August 1998 – 29 May 1999 |
| Champions | Slovan Bratislava |
| Relegated | BSC JAS Bardejov Rimavská Sobota |
| Champions League | Slovan Bratislava |
| UEFA Cup | Inter Bratislava Spartak Trnava Dukla Banská Bystrica |
| Intertoto Cup | Ozeta Dukla Trenčín MŠK Žilina |
| Matches played | 240 |
| Goals scored | 616 (2.57 per match) |
| Top goalscorer | Martin Fabuš (19 goals) |
| Biggest home win | Inter 10:0 Bardejov |
| Biggest away win | Dubnica 0:6 Inter |
| Highest scoring | Inter 10:0 Bardejov |
| Average attendance | 3,659 |
← 1997–98 | |
The 1998–99 Slovak First Football League (known as the Mars superliga for sponsorship reasons) was the sixth season of first-tier football league in Slovakia, since its establishment in 1993. It began on 1 August 1998 and ended on 29 May 1999. 1. FC Košice were the defending champions.