2005–06 Primeira Liga
Vitória de Guimarães
Vitória de Setúbal
|Goals scored||681 (2.23 per match)|
|Best Player||Ricardo Quaresma|
|Top goalscorer||Albert Meyong (17 goals)|
|Biggest home win||Braga 5–0 Rio Ave
(17 February 2006)
|Biggest away win||Maritimo 0–6 Vitória de Setúbal
(20 November 2005)
|Highest scoring||União de Leiria 5–2 Rio Ave
(7 May 2006) 
|Portuguese football 2005–06|
|Primeira Liga (Tier 1)|
|Liga de Honra (Tier 2)|
|Segunda Divisão (Tier 3)|
|Terceira Divisão (Tier 4)|
|Taça de Portugal (Cup)|
The 2005–06 Primeira Liga was the 72nd edition of top flight of Portuguese football. It started on 19 August 2005 with a match between Sporting CP and Belenenses and ended on 7 May 2006. The league was contested by 18 clubs with Benfica as defending champions.
Porto and Sporting CP were both qualified for the 2005–06 UEFA Champions League group stage, and Benfica qualified for the UEFA Champions League qualifying round; Braga, Nacional and Vitória de Setúbal qualified for the UEFA Cup 2006–07; in opposite, with the league dropping to 16 teams, four teams were relegated to the Liga de Honra; Gil Vicente, Rio Ave, Vitória de Guimarães and Penafiel. Meyong was the top scorer with 17 goals.
The season's first goal was scored by Rogério, who scored a 39th-minute goal for Sporting against Belenenses. The first yellow card of the season was given to Sporting's Fábio Rochemback in the opening game of the season, and the first red card was given to Benfica's João Pereira in his club's away draw against Académica de Coimbra.
Promotion and relegation
Teams relegated to Liga de Honra
Moreirense, Beira-Mar and Estoril were relegated to the Liga de Honra following their final classification in 2004–05 season.
Teams promoted from Liga de Honra
The other three teams were replaced by Estrela da Amadora, Paços de Ferreira and Naval 1º de Maio from the Liga de Honra.
||Qualification or relegation
|1||Porto (C)||34||24||7||3||54||16||+38||79||2006–07 UEFA Champions League Group stage|
|3||Benfica||34||20||7||7||51||29||+22||67||2006–07 UEFA Champions League Third qualifying round|
|4||Braga||34||17||7||10||38||22||+16||58||2006–07 UEFA Cup First round|
|7||União de Leiria||34||13||8||13||44||42||+2||47|
|8||Vitória de Setúbal||34||14||4||16||28||33||−5||46||2006–07 UEFA Cup First round 1|
|9||Estrela da Amadora||34||12||9||13||31||33||−2||45|
|11||Paços de Ferreira||34||11||9||14||38||49||−11||42|
|12||Gil Vicente (R)||34||11||7||16||37||42||−5||40||Relegation to 2006–07 Liga de Honra 2|
|14||Naval 1º de Maio||34||11||6||17||35||48||−13||39|
|16||Rio Ave (R)||34||8||10||16||34||53||−19||34||Relegation to 2006–07 Liga de Honra|
|17||Vitória de Guimarães (R)||34||8||10||16||28||41||−13||34|
Rules for classification: 1st points, 2nd head-to-head, 3rd goals average
1 Vitória de Setúbal qualified for the UEFA Cup as Portuguese Cup runners-up
2 Gil Vicente fielded an ineligible player, Angolan forward Mateus. Due to this they lost the right to participate in the 2006–07 Primeira Liga which as a result meant Belenenses remained in the league
(C) = Champion; (R) = Relegated; (P) = Promoted; (E) = Eliminated; (O) = Play-off winner; (A) = Advances to a further round.
Only applicable when the season is not finished:
(Q) = Qualified to the phase of tournament indicated; (TQ) = Qualified to tournament, but not yet to the particular phase indicated; (RQ) = Qualified to the relegation tournament indicated; (DQ) = Disqualified from tournament.
|Home ╲ Away||ACA||BEL||BEN||BOA||BRA||EST||GVI||MAR||NAC||NAV||PAÇ||PEN||POR||RAV||SCP||ULE||VGU||VSE|
|Estrela da Amadora||3–2||1–2||1–2||1–1||0–0||1–0||2–2||2–1||0–2||0–0||1–0||2–1||0–0||0–0||1–2||2–0||1–0|
|Naval 1º de Maio||0–1||2–1||1–1||2–2||0–1||2–0||1–4||2–0||3–1||1–0||4–1||2–3||1–0||0–2||0–2||0–0||0–3|
|Paços de Ferreira||2–1||1–1||3–1||0–1||1–0||2–1||1–0||1–2||3–1||0–1||2–2||0–1||2–1||3–0||1–1||1–1||1–2|
|União de Leiria||0–2||2–2||3–1||0–0||0–1||1–1||3–0||0–0||2–1||0–0||3–0||1–1||1–3||5–2||0–1||1–0||0–2|
|Vitória de Guimarães||1–1||2–2||2–0||1–1||0–2||0–1||2–0||1–0||0–2||0–0||0–2||3–1||0–2||1–1||0–1||0–3||4–0|
|Vitória de Setúbal||0–1||1–0||0–1||0–2||1–0||1–0||1–0||0–1||4–1||1–1||0–1||2–0||0–2||1–0||1–2||2–0||0–1|
Top goal scorers
|6||Joeano||13||Académica de Coimbra|
|7||Marek Saganowski||12||Vitória de Guimarães|
Portuguese Golden Shoe
- "Leiria 5 - 2 Rio Ave" [Leiria 5 - 2 Rio Ave] (in Portuguese). 7 May 2006. Retrieved 11 December 2011.