Cintruénigo is a town and municipality in the province and autonomous community of Navarre, in northern Spain. It lies in the Merindad de Tudela, within the Ribera de Navarra and the comarca of Tudela, in the lower reaches of the Alhama river. The town is about 92 kilometres from Pamplona, the capital of the autonomous community.
Its population was 8,026 in 2020, according to the Instituto Nacional de Estadística. The town's location in the Ribera de Navarra places it in the southern part of the region, near the Ebro valley.