- 9 January - Abû 'Uthmân Sa'îd Ibn Hakam Al Qurashi , Ra'îs of Manûrqa (born 1204 )
- August 25 - Thomas Cantilupe , English saint
- October 13 - Nichiren , Japanese founder of Nichiren Buddhism (born 1222 )
- December 11 - Llywelyn The Last , Welsh Prince of Gwynedd (born 1228 )
- December 11 - Michael VIII Palaeologus , Byzantine Emperor (born 1225 )
- Georgius Acropolita , Byzantine historian and statesman (born 1217 )
- Ahmad Fanakati , Mongol finance official
- Owain Goch Ap Gruffydd , Welsh prince
- Abaqa Khan of the Mongol Empire (born 1234 )
- Eleanor De Montfort , last princess of Wales (born 1252 )
- Roger Mortimer, 1st Baron Wigmore (born 1231 )
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