| Club: | Villarreal |
| Season: | 2005–06 |
| Chrtitle: | President |
| Chairman: | Fernando Roig |
| Mgrtitle: | Head coach |
| Manager: | Manuel Pellegrini |
| Stadium: | El Madrigal |
| League: | La Liga |
| League Result: | 7th |
| Cup1: | Copa del Rey |
| Cup1 Result: | Round of 16 |
| Cup2: | UEFA Champions League |
| Cup2 Result: | Semi-finals |
| League Topscorer: | Juan Román Riquelme (12)[1] |
| Season Topscorer: | Juan Román Riquelme (12) |
| Pattern La1: | _villarreal0506h |
| Pattern B1: | _villarreal0506h |
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| Leftarm1: | FFFF00 |
| Body1: | FFFF00 |
| Rightarm1: | FFFF00 |
| Shorts1: | FFFF00 |
| Socks1: | FFFF00 |
| Pattern La2: | _villarreal0506a |
| Pattern B2: | _villarreal0506a |
| Pattern Ra2: | _villarreal0506a |
| Pattern Sh2: | _villarreal0506a |
| Pattern So2: | _villarreal0506a |
| Leftarm2: | 000000 |
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| Prevseason: | 2004–05 |
| Nextseason: | 2006–07 |
The 2005–06 season was Villarreal Club de Fútbol's 83rd season in existence and the club's 6th consecutive season in the top flight of Spanish football. In addition to the domestic league, Villarreal participated in this season's editions of the Copa del Rey and the UEFA Champions League. The season covered the period from 1 July 2005 to 30 June 2006.
Villarreal reached the semi-finals of the UEFA Champions League, being knocked out by eventual runners-up Arsenal 1–0 on aggregate, with Arsenal keeper Jens Lehmann saving a last-minute Juan Román Riquelme penalty, in the second leg, that would have taken the tie to extra time in front of Villarreal's home support.
Despite Villarreal's excellent form in Europe, the continental success was not translated to the domestic stage. Villarreal finished seventh, consigning them to Intertoto Cup football.
Squad at end of season[2]
See main article: 2005–06 La Liga.
See main article: 2005–06 Copa del Rey.
See main article: 2005–06 UEFA Champions League.
See main article: 2005–06 UEFA Champions League knockout stage.