Surface area

Portugalete covers an area of 3.2 km2 , with half a square kilometre taken up by the Ría. Portugalete is one of a group of five municipalities in Vizcaya with an area of fewer than 5 square kilometres. Nonetheless, it stands in first place in terms of population density, with 15.000 people per square kilometre.

The municipal area matches with an elongated ridge that runs in a NW-SE direction, limited by the Ría and the River Ballonti. This ridge consists of a series of gentle hillocks whose heights are: Los Hoyos, 102m; Campanzar, 103m; San Roque, 85m. The line of hilltops has an approximate length of 1.200 m.