The 1930–31 La Liga season started 7 December 1930, and finished 5 April 1931.
Athletic Bilbao defended the title successfully and won the league thanks to its better goal difference in a three-way draw in the first position.
Alavés made their debut in La Liga.
Source: BDFútbol Rules for classification: 1) points; 2) head-to-head points; 3) head-to-head goal difference; 4) goal difference; 5) number of goals scored. (C) Champions; (R) Relegated Notes:
^ abcAthletic Bilbao finished ahead of Racing Santander and Real Sociedad on head-to-head goal difference: Athletic Bilbao +7, Racing Santander –3, Real Sociedad –4
^ abArenas finished ahead of Real Madrid on head-to-head points: Arenas–Real Madrid 4–1, Real Madrid–Arenas 1–2.
^ abAlavés finished ahead of Español on head-to-head goal difference: Alavés–Español 4–1, Español–Alavés 2–0.