西内（法语：Ciney）是位于比利时那慕尔省东部阿登地区的一座城市，人口14,958（2006年）。

Ciney (French pronunciation: ​[si.nɛ]) is a Walloon municipality located in the Belgian province of Namur. On January 1, 2006, Ciney had a total population of 14,958. The total area is 147.56 km² which gives a population density of 101 inhabitants per km².