With the proclamation of the Second Spanish Republic on April 14, all teams with "Real" ("Royal") in their names, changed it due to anti-monarchic reasons.
Real Sociedad changes to Donostia FC.
The competition started on April 12, 1931, and concluded on June 21, 1931, with the final, held at the Estadio Chamartín in Madrid.
Athletic Bilbao won their 11th title, the second in a row.
Athletic Bilbao and Sporting Gijón received a bye.