The 1998–99 La Liga season was the 68th since its establishment. It began on 29 August 1998, and concluded on 20 June 1999.
Promotion and relegation
Twenty teams competed in the league – the top seventeen teams from the previous season and the three teams promoted from the Segunda División. The promoted teams were Alavés (playing top flight football for the first time in forty two years), Extremadura (returning after a one-year absence) and Villarreal (playing in the top flight for the first time ever). They replaced Compostela, Mérida and Sporting Gijón after spending time in the top flight for four, one and twenty one years respectively.
Source: Diario AS (newspaper archive, in paper), copy of the day: Monday 21 June 1999
Fair Play award
From this season, RFEF develops and publishes annually the Fair Play classification according to the Points System which was agreed by the board of the federation on 30 October 1998 and later expanded and fixed at another meeting and published in the 2nd Mailshot of the 2000–01 season. The classification for this season was computed from the Second legg, in order to experience results.