| Competition: | Mars superliga |
| Season: | 1999–2000 |
| Dates: | 24 July 1999 – 17 May 2000 |
| Winners: | Inter Bratislava |
| Relegated: | VTJ Koba Senec ZTS Kerametal Dubnica 1. HFC Humenné FC Nitra DAC Dunajská Streda Dukla Banská Bystrica Baník Prievidza |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Inter Bratislava |
| Continentalcup2: | UEFA Cup |
| Continentalcup2 Qualifiers: | 1. FC Košice Slovan Bratislava |
| Continentalcup3: | Intertoto Cup |
| Continentalcup3 Qualifiers: | Ozeta Dukla Trenčín |
| League Topscorer: | Szilárd Németh (16 goals) |
| Biggest Home Win: | Inter 7:0 Prievidza |
| Biggest Away Win: | Senec 0:5 Inter |
| Highest Scoring: | Inter 7:0 Prievidza Trenčín 5:2 B.Bystrica Prievidza 4:3 Petržalka |
| Matches: | 240 |
| Total Goals: | 592 |
| Average Attendance: | 3,041 |
| Prevseason: | 1998–99 |
| Nextseason: | 2000–01 |
The 1999–2000 Slovak First Football League (known as the Mars superliga for sponsorship reasons) was the seventh season of first-tier football league in Slovakia, since its establishment in 1993. It began on 24 July 1999 and ended on 17 May 2000. ŠK Slovan Bratislava were the defending champions.
The season was the last one in which 16 teams competed, as Mars superliga decided that the league would be reduced to 10 teams the following season. Therefore, seven teams were relegated to the 2. Liga and only one was promoted from the 2. Liga.
A total of 16 teams was contested in the league, including 14 sides from the 1998–99 season and two promoted from the 2. Liga.
FC Rimavská Sobota and BSC JAS Bardejov was relegated to the 1999–2000 2. Liga. The two relegated teams were replaced by FK DAC 1904 Dunajská Streda and FK VTJ Koba Senec.
| 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 | |
| Dunajská Streda | 16,410 | |||
| 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 | |
| VTJ Koba Senec | Senec | Koba Senec Stadion | 5,000 | |
| ZTS Kerametal Dubnica | Dubnica | Štadión Zimný | 5,450 |
| Rank | Player | Club | Goals[1] |
|---|---|---|---|
| 1 |  Szilárd Németh | Inter Bratislava | 16 |
| 2 |  Ruslan Lyubarskyi | Košice | 15 |
| 3 | Tomáš Medveď | Artmedia Petržalka | 14 |
| 4 | Marek Mintál | Žilina | 12 |
| 5 |  Luis Fabio Gomes | Spartak Trnava | 10 |
| Stanislav Varga | Slovan Bratislava | ||
| 7 | Jozef Kožlej | Košice | 9 |
| Marián Ľalík | Inter Bratislava | ||
| Július Šimon | Dunajská Streda/Artmedia Petržalka | ||
| Jozef Urblík | Baník Prievidza |