塞西（法语：Cessy），是法国东部安省的一个市镇。面积 6.55平方公里，人口2283，人口密度348.55人／平方公里（1999年）。

塞西人口变化图示

数据来源：INSEE

Cessy is a commune in the Ain department in eastern France. The area was first inhabited by two framing families in the eleventh century, and as the town has grown its agricultural heritage has remained a significant feature, with the populated area surrounded by a vast expanse of fields and an annual agricultural festival.