Giuseppe Sirtori (17 April 1813 – 18 September 1874) was an Italian soldier, patriot and politician who fought in the unification of Italy.

Here he grew strife with the more moderate Venetian leader Daniele Manin, and was even accused of plotting to surrender the city (5 March 1849) during the long Austrian siege of 1849.

However, he soon gained the enmity of the Italian patriots in France, who were afraid of a too large French control over Italy; this led Murat to jail him in an asylum in Paris.

Sirtori moved to Piedmont, where he sought for a position in the Savoy army; however, his Republican past and the Mazzini veto prevented him to take part in the successful Second Italian War of Independence (1859).

On July 19 Garibaldi shortly named him vice-dictator of Sicily, but Sirtori's main role was that of de facto chief of staff in the volunteer liberation army.

His first task, as plenipotentiary in Catanzaro, in Calabria, was the suppression of the brigand bands which had appeared in great number in southern Italy after the Piedmontese occupation.

His removal led some of his enemies to accuse him of the defeat: the polemics went on until 1871, when another general, Giuseppe Govone, now turned Ministry of War, re-established Sirtori's honor, naming him commander of a division in Alessandria.