Cossutia was a Roman woman who became engaged to Julius Caesar prior to his reaching adulthood.

[3] She was recommended to Caesar by his father and it is believed that the future dictator of Rome married Cossutia after he began wearing the toga virilis.

[2] It is also possible that Caesar chose to leave her to marry Cornelia because he had been nominated as Flamen Dialis, a role which demanded marriage to a patrician via confarreatio.

Among those arguing that Caesar was never married to Cossutia are Ludwig Friedrich Otto Baumgarten-Crusius, Napoleon III, Charles Merivale, James Anthony Froude, Theodore Ayrault Dodge, William Warde Fowler, Ernest Gottlieb Sihler, Adolf von Mess [de], and John Carew Rolfe.

[4] The French author Marie-Nicolas Bouillet [fr] lists Cossutia first, then Cornelia, Pompeia, and Calpurnia, as wives of Caesar.