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For the town in France, see Senones, Vosges.

The Senones were a Gallic people of Gallia Celtica, who in the time of Julius Caesar inhabited the district which now includes the departments of Seine-et-Marne, Loiret and Yonne.

From 53-51 B.C. they were engaged in hostilities with Caesar brought about by their expulsion of Cavarinus, whom he had appointed their king. In 51 B.C., a Senonian named Drappes threatened the Provincia, but was captured and starved himself to death. From this time the Gallic Senones disappear from history. In later times they were included in Gallia Lugdunensis. Their chief towns were Agedincum (later Senones, whence Sens), Metiosedum (Melun; according to A. Holder, Meudon), and Vellaunodunum (site uncertain).

More important historically were the Senones who lived in eastern Italy. They could be a branch of the above (called ~vwver, Senones, by Polybius), who about 400 B.C. made their way over the Alps and, having driven out the Umbrians^{[citation needed]}settled on the east coast of Italy from Ariminum to Ancona, in the so-called ager Gallicus, and founded the town of Sena Gallica (Sinigaglia), which became their capital. In 391 they invaded Etruria and besieged Clusium. The Clusines appealed to Rome, whose intervention, accompanied by a violation of the law of nations, led to war, the defeat of the Romans at the Allia (18 July 390) and the capture of Rome. For more than 100 years the Senones were engaged in hostilities with the Romans, until they were finally subdued (283) by P. Cornelius Dolabella and driven out of their territory. Nothing more is heard of them in Italy. It is probable that they formed part of the bands of Gauls who spread themselves over the countries by the Danube, Macedonia and Asia Minor. A Roman colony was established at Sena, called Sena Gallica (currently Senigallia) to distinguish it from Sena Julia (Siena) in Etruria.

• This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.