Article · Wikipedia archive · Last revised Jun 20, 2026

Alsasua – Altsasu

Alsasua is a town located in the autonomous community of Navarre, northern Spain. Its population in 2017 was 7,419. The Battle of Alsasua took place here in 1834. 30 years later the town turned into a railway hub, transforming its demography, economy, and cultural landscape. In 2016, a fight erupting in a bar escalated into an Audiencia Nacional judicial case that stirred the town. The bus and coach building company Sunsundegui had its factory in the town and was a major local employer, but the company closed in 2025.

Last revised
Jun 20, 2026
Read time
≈ 1 min
Length
206 w
Citations
3
Source
Altsasu/Alsasua
Altsasu
Alsasua
Aerial view of Altsasu/Alsasua
Aerial view of Altsasu/Alsasua
Flag of Altsasu/Alsasua
Coat of arms of Altsasu/Alsasua
Altsasu/Alsasua
Location of Altsasu/Alsasua within Navarre
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Altsasu/Alsasua
Location of Altsasu/Alsasuawithin Spain
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Coordinates: 42°53′43″N 2°10′8″W / 42.89528°N 2.16889°W / 42.89528; -2.16889
Country Spain
Autonomous community Navarre
ProvinceNavarre
Comarca/EskualdeaLa Barranca/Sakana
Government
 • Alcalde
(Mayor)
Javier Ollo Martínez1 (Geroa Bai)
Area
 • Total
26.72 km2 (10.32 sq mi)
Population
 (2025-01-01)2
 • Total
7,717
 • Density288.8/km2 (748.0/sq mi)
 (INE)
Demonymalsasuarra
Time zoneUTC+1 (CET)
 • Summer (DST)UTC+2 (CEST)
Postal code
31800

Alsasua (in Spanish; Altsasu in Basque; official name: Altsasu/Alsasua) is a town located in the autonomous community of Navarre, northern Spain. Its population in 2017 was 7,419.3 The Battle of Alsasua took place here in 1834. 30 years later the town turned into a railway hub, transforming its demography, economy, and cultural landscape. In 2016, a fight erupting in a bar escalated into an Audiencia Nacional judicial case that stirred the town. The bus and coach building company Sunsundegui had its factory in the town and was a major local employer, but the company closed in 2025.

Alsasua in 1928. source ↗
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