伊萨瓦（西班牙语：Isaba），是西班牙纳瓦拉的一个市镇。总面积147平方公里，总人口510人（2001年），人口密度3人/平方公里。

Isaba is a town and municipality located in the province and autonomous community of Navarre, northern Spain. Is the main town of the Roncal valley and is sited in the Pirinees of the autonomous Region.