Bloody Week may refer to:
* ''
Semaine sanglante'', a weeklong battle at the end of the 1871 Paris Commune
*
''Sanglante semaine'' (Lyon), the suppression of the Second Canut revolt in Lyon, France, in 1834
* ''
Berliner Blutwoche'', the suppression of a strike in Berlin in March 1919
*
Bloody Week (Argentina), a series of riots and massacres in Buenos Aires, Argentina, in January 1919
*
Bloody Week (Germany), the suppression of Berlin's Spartacist uprising in January 1919
*
Köpenick's week of bloodshed, a week of arrests, torture, and killings by the German ''Sturmabteilung'' in June 1933
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