| Langreo | |
| Settlement Type: | Municipality |
| Official Name: | Llangréu / Langreo |
| Native Name: | Llangréu |
| Flag Size: | 150 |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location in Spain |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Asturias |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Nalón |
| Coordinates: | 43.3°N -46°W |
| Elevation M: | 1021 |
| Area Total Km2: | 82.46 |
| Population Demonym: | Langreanos |
| Population Density Km2: | auto |
| Blank Name Sec1: | Official language(s) |
| Blank Info Sec1: | Asturian and Spanish |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Area Code Type: | Dialing code |
| Area Code: | 33930(District of La Felguera)33900(District of Sama)33920(District of Riaño)33909(District of Ciaño)33934(District of Lada) |
| Leader Title: | Mayor |
| Leader Name: | Carmen Arbesçu |
| Leader Party: | PSOE |
Langreo (pronounced as /es/) or Llangréu (in Asturian; Bable; Leonese; Asturleonese pronounced as /ʎaŋˈɡɾew/) (Asturian)[1] is a municipality and town in northern Spain, in Asturias. It is the 4th largest town of Asturias with 43,000 inhabitants. Langreo is located in the centre of Asturias, approximately 20km (10miles) south-east of Oviedo. It was an important mining and metallurgical center.
In the neighbourhood fruit and cider are produced, and there are still important coal mines, foundries, and factories for the manufacture of coarse cloth.
According to a legend Langreo was the place where the Moorish governor Munuza was killed while trying to flee from Asturias at the beginning of the Reconquest. Langreo was settled by the Romans, who built a large Roman bridge that is not conserved today.
In the past, it was one of the most important mining and metallurgical points of Spain since the 18th century, and it was also well known because of workers struggles and its cultural life. The 3rd railway to be built in the Iberian Peninsula was the FC of Langreo. The Factory of La Felguera was one of the most important iron works centers in Spain, and the Langreo mines was well known in whole the country.
Because of the Spanish "Industrial Restructuring", Langreo lost its industrial importance, but today the town hosts Bayer, where 100% of the acetylsalicylic acid of the German enterprise are produced. Langreo also holds the technologies centre Valnalón.
Langreo has historic monuments like the church of San Esteban, the Quintana Tower or the Sanctuary of Carbayu. Also preserves good examples of its industrial heritage and it hosts the Siderurgy Museum Of Asturias within the old Felguera Factory, the Samuño Valley and Railway Mining Museum, and the art gallery Pinacoteca Eduardo Úrculo.
Langreo celebrates fiestas of San Pedro and Santiago, and special gastronomic days: Carnival (February) Cider (April) and Fabada (December).
The largest town is Langreo formed by the most important districts: La Felguera (20,000 inhabitants), Sama (10,000), and Riaño, Ciaño, Lada and Barros, also known as parishes.
There are eight parishes (administrative divisions) by population:
| Party/List | 1979 | 1983 | 1987[2] | 1991 | 1995 | 1999 | 2003 | 2007 | 2011[3] | 2015 | 2019 | |
| FSA-PSOE | 10 | 14 | 10 | 11 | 8 | 9 | 8 | 10 | 7 | 6 | 9 | |
| PCE / IU-BA | 7 | 6 | 7 | 9 | 10 | 11 | 7 | 5 | 4 | 6 | ||
| Somos | 5 | |||||||||||
| CD / AP / PP | 2 | 5 | 4 | 4 | 7 | 5 | 6 | 6 | 4 | 3 | 2 | |
| C’s | 1 | 2 | ||||||||||
| FAC | 4 | |||||||||||
| FDLI | 2 | |||||||||||
| UCD / CDS | 6 | 0 | 4 | 1 | ||||||||
| Unidas (Somos+IU) | 8 | |||||||||||
| Total | 25 | 25 | 25 | 25 | 25 | 25 | 21 | 21 | 21 | 21 | 21 | |