西锡安（Sicyon/Σικυών）是一个古希腊城邦。它位于伯罗奔尼撒半岛北部的科林西亚，在科林斯与亚该亚之间。

西锡安建在科林斯湾岸边的一块三角形高地上，城市与港湾之间有一块平原，盛产水果和橄榄。多里安人入侵后，在此地分成三个部落居住下来。除此之外，西锡安地区还有一个伊奥尼亚人部落。

在数个世纪里，西锡安都是阿尔戈斯的附属国。

Sicyon (/ˈsɪʃiˌɒn, ˈsɪs-/; Greek:Σικυών; gen.: Σικυῶνος) was an ancient Greek city state situated in the northern Peloponnesus between Corinth and Achaea on the territory of the present-day regional unit of Corinthia. An ancient monarchy at the times of the Trojan War, the city was ruled by a number of tyrants during the Archaic and Classical period and became a democracy in the 3rd century BC. Sicyon was celebrated for its contributions to ancient Greek art, producing many famous painters and sculptors. In Hellenistic times it was also the home of Aratus of Sicyon, the leader of the Achaean League.