西贡萨（西班牙语：Sigüenza），是西班牙卡斯蒂利亚-拉曼恰瓜达拉哈拉省的一个市镇。总面积387平方公里，总人口4724人（2001年），人口密度12人/平方公里。

Sigüenza is a city in the province of Guadalajara in Spain.

The site of the ancient Segontia ("dominating over the valley") of the Celtiberian Arevaci, now called Villavieja (“old town”), is half a league distant from the present Sigüenza. Livy mentions the town in his discussion of the wars of Cato the Elder with the Celtiberians.