Segura is located in the South of Guipuzcoa, in the region of Goierri. Surrounded by mountains and nature and close to the most important cities of the Basque Country.
Segura-bordering towns are as follows: to de north Mutiloa, to the south Zegama, to the east Idiazabal and to the west Zerain. Segura has an area of 9.2 km2 and is located 240 meters above sea level. The Oria River crosses the town.
The highest mountains around are Txindoki (1346 m) and Aizkorri (1528 m). Within Segura the two most notable mountains are Santa Barbara (724 m) and Maudinamendi (786 m).
The most important cities of the Basque Country are the following distances from Segura: Donosti-San Sebastian 53 km, Vitoria-Gasteiz 73 km, Pamplona 76 km, Bilbao 96 km, Baiona 105 km.