1331

Year 1331 (MCCCXXXI) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.

September–December

 * September 8 – Stefan Dusan declares himself king of Serbia.
 * September 27 – Battle of Płowce: The German Teutonic Knights and the Poles battle to a draw.

Date unknown

 * The Sieges of Cividale del Friuli and Alicante begin.
 * The Genkō War begins in Japan.
 * Ibn Battuta visits Kilwa.
 * The first recorded outbreak of the Black Death occurs, in the Chinese province of Hubei.

Births

 * February 16 – Coluccio Salutati, Florentine political leader (d. 1406)
 * April 14 – Jeanne-Marie de Maille, French Roman Catholic saint (b. 1414)
 * April 30 – Gaston III, Count of Foix (d. 1391)
 * October 4 – James Butler, 2nd Earl of Ormonde (d. 1382)
 * date unknown
 * Hamidüddin Aksarayî, Ottoman teacher of Islam (d. 1412)
 * Blanche d'Évreux, queen consort of France (d. 1398)
 * Michael Palaiologos, Byzantine prince
 * probable – Salvestro de' Medici, provost of Florence (d. 1388)

Deaths

 * January 14 – Odoric of Pordenone, Italian explorer
 * April 17 – Robert de Vere, 6th Earl of Oxford (b. c. 1257)
 * May 12 – Engelbert of Admont, abbot of Admont in Styria
 * October 27 – Abulfeda, Kurdish Syrian historian and geographer (b. 1273)
 * November 11 – Stefan Uroš III Dečanski of Serbia (b. c. 1285)
 * December 26 – Philip I, Prince of Taranto, titular Latin Emperor (b. 1278)
 * December 30 – Bernard Gui, French inquisitor (b. 1261 or 1262)
 * date unknown – Matilda of Hainaut, Princess of Achaea (b. 1293)