La Seu d'Urgell (Catalan: [la ˈsɛw ðuɾˈdʒeʎ] ; Spanish: Seo de Urgel [seo ðe uɾˈxel] , formerly Urgell) is a town located in Alt Urgell county in Alt Pirineu, Catalonia, Spain. The town is also the head of its judicial district and the seat of the Bishop of Urgell, one of the co-princes of Andorra. It is the most populated town of the region, with 17.4% of its population. La Seu d'Urgell and Puigcerdà together have 30% of the population of the area. It has a population of 12,831 (register office, 2024)
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It is located at the confluence of the Segre and the Valira rivers. The city is in the local region of Urgellet, a Pyrenean region formed by 16 municipalities of Alt Urgell. Urgellet and Andorra were originally the County of Urgell with its capital in la Seu d'Urgell before the county expansion to the south.