Tsarina or tsaritsa (also spelled csarina or csaricsa, tzarina or tzaritza, or czarina or czaricza; Bulgarian: царица, romanized: tsaritsa; Serbian: царица / carica; Russian: царица, romanized: tsaritsa) is the title of a female autocratic ruler (monarch) of Bulgaria, Serbia or Russia, or the title of a tsar's wife. The English spelling is derived from the German czarin or zarin, in the same way as the French tsarine / czarine, and the Spanish and Italian czarina / zarina. (A tsar's daughter is a tsarevna.)

"Tsarina" or "tsaritsa" was the title of the female supreme ruler in the following states:

• Bulgaria: in 913–1018, in 1185–1422 and in 1908–1946
• Serbia: in 1346–1371
• Russia: officially from about 1547 until 1721, unofficially in 1721–1917 (officially "Empresses").