穆瓦萨克（法语：Moissac）是法国南部-比利牛斯大区 塔恩-加龙省的一个市镇，属于卡斯特尔萨拉桑区 县。该市镇2009年时的人口 为12244人。

穆瓦萨克人口变化图示

数据来源：INSEE

Moissac is a commune in the Tarn-et-Garonne department in the Midi-Pyrénées region in southern France. The town is situated at the confluence of the Garonne and Tarn rivers at the Canal de Garonne. Route nationale N113 was constructed through the town and between Valence-d'Agen and Castelsarrasin.