| Competition: | Slovenian PrvaLiga |
| Season: | 2005–06 |
| Winners: | Gorica (4th title) |
| Relegated: | Rudar |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Gorica |
| Continentalcup2: | UEFA Cup |
| Continentalcup2 Qualifiers: | Domžale Koper (cup winners) |
| Continentalcup3: | Intertoto Cup |
| Continentalcup3 Qualifiers: | Maribor |
| League Topscorer: | Miran Burgič (24 goals) |
| Biggest Home Win: | Primorje 6–1 Rudar Domžale 5–0 Celje Nafta 5–0 Rudar Gorica 5–0 Bela Krajina |
| Biggest Away Win: | Rudar 0–8 Domžale |
| Highest Scoring: | Rudar 0–8 Domžale Primorje 6–2 Drava |
| Matches: | 180 |
| Total Goals: | 490 |
| Best Player: | Ermin Rakovič[1] |
| Longest Wins: | 5 games Koper Maribor Drava |
| Longest Unbeaten: | 14 games Domžale |
| Longest Winless: | 16 games Rudar |
| Longest Losses: | 5 games Rudar |
| Highest Attendance: | 5,000 Maribor 4–1 Gorica |
| Lowest Attendance: | 100 Rudar 1–2 Nafta |
| Attendance: | 170,114 |
| Average Attendance: | 966 |
| Prevseason: | 2004–05 |
| Nextseason: | 2006–07 |
The 2005–06 Slovenian PrvaLiga season started on 24 July 2005 and ended on 3 June 2006. Each team played a total of 36 matches.
Bela Krajina won on away goals rule.
Every team plays four times against their opponents, twice at home and twice on the road, for a total of 36 matches.
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 |  Miran Burgić | Gorica | 24 |
| 2 | Valter Birsa | Gorica | 19 |
| 3 | Oskar Drobne | Koper | 17 |
| 4 |  Viktor Trenevski | Drava Ptuj | 16 |
| 5 | Dražen Žeželj | Primorje | 14 |
| Ermin Rakovič | Domžale | ||
| 7 | Jože Benko | Nafta Lendava | 13 |
| 8 |  Enes Demirović | Gorica | 12 |
| 9 | Rok Kronaveter | Drava Ptuj | 10 |
| Nikola Nikezić | Domžale |