Donostia/San Sebastián Village · Donostia/San Sebastián, Donostialdea, Gipuzkoa Capital of Gipuzkoa and head town of the Donostialdea comarca, with 189,866 inhabitants (INE, 2025) and 60.89 km² in area. The town center is at 12 m altitude, while the highest point in the municipality (the Urdaburu exclave) reaches 585 m. Photo: Ermell (CC BY-SA 4.0) What to see and do in Donostia/San Sebastián