| Asón-Agüera | |
| Native Name Lang: | es |
| Settlement Type: | Comarca |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Cantabria |
| Subdivision Type2: | Province |
| Subdivision Name2: | Cantabria |
| Seat Type: | Capital |
| Seat: | Ramales de la Victoria |
| Parts Type: | Municipalities |
| Parts Style: | list |
| P1: | Guriezo, Limpias, Ramales de la Victoria, Rasines, Ruesga, Soba, Valle de Villaverde |
| Area Total Km2: | 261.28 |
| Population Total: | 15087 |
| Population As Of: | 1.1.2018 |
| Population Density Km2: | auto |
| Population Demonym: | asonero, -a |
| Blank Name Sec1: | Largest municipality |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Area Code Type: | Dialing code |
The Asón-Agüera comarca is a historical region of Cantabria, Spain. It is located in the upper courses of the Asón and Agüera rivers, near the border with Vizcaya in the Basque Country. The comarca encompasses the basin of the Asón river and its tributaries such as the Gándara. The region was part of the historical territories of the Valley of Soba and Ruesga Villaverde, and the Merindad de Vecio (Junta de Parayas, Villas Laredo, Seña and clean, and Valle de Guriezo).
| bgcolor=black colspan=8 style="color:white;" | Most Populated Places | ||||
|---|---|---|---|---|---|
| width=4% | Rank | width=87% | Municipality | width=9% | Population 2018 |
| 1º | Ampuero | 4,219 | |||
| 2º | Ramales de la Victoria | 2,881 | |||
| 3º | Guriezo | 2,347 | |||
At the start of 2018, the total population of the region (according to the INE) was 15,087 inhabitants (see table). The three most populated centers are: Ampuero (4,219), Ramales de Victoria (2,881) and Guriezo (2,347). Lesser populated places are: Valle de Villaverde (286) Arredondo (470) and Rasines (952).
Asón Valley is known for its rugged solid limestone, which house inside caving extraordinary wealth and ancient forests of beech, oak and holm undoubtedly the most notable in the eastern part of Cantabria.
Soba Valley is crossed by the Gandara River, a tributary of the Assos River. Historical and municipal limits of Soba exceed those of geographically understood valley, and also include the headwaters of the Asón, the right bank of the valley of the river Miera (Valdició village in the municipality of Soba) and the left bank of the valley of the river Calera, bordering with the province of Vizcaya.
Archaeological sites: