| Castropol | |
| Settlement Type: | Municipality |
| 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: | Eo-Navia |
| Subdivision Type4: | Judicial district |
| Subdivision Name4: | Castropol |
| Seat Type: | Capital |
| Seat: | Castropol |
| Coordinates: | 43.5333°N -9°W |
| Elevation Max M: | 1197 |
| Area Total Km2: | 125.77 |
| Population Demonym: | castropolense |
| Population Density Km2: | auto |
| Blank Name Sec1: | Official language(s) |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 33760, 33768, 33769, 33778 and 33794 |
| Area Code Type: | Dialing code |
| Leader Title: | Alcalde |
| Leader Name: | Francisco Javier Vinjoy Valea |
| Leader Party: | PSOE |
Castropol is a municipality in Asturias, Spain. It is also the name of a parish within the municipality and a town within the parish.
The municipality of Castropol has a population of 3696 (INE, 2014). It is bounded on the north by the Cantabrian Sea and on the west by a coastal inlet, or ria, which separates it from the municipality of Ribadeo in Galicia, called the river Eo.[1] To the west it is bordered by Tapia de Casariego, by El Franco, Boal and other Asturian municipalities, and to the south by Vegadeo and Villanueva de Oscos.
Castropol is one of the municipalities in which Eonaviego, a Galician-Asturian dialect, is spoken.
Some examples of notable architecture include the 'Capilla del Campo' (15th century), the 'Palacio de Valledor' and 'Palacio de Marqueses de Santa Cruz de Marcenado' (16th-18th centuries, the 'Casa de las Cuatro Torres' (18th century), and the 'Parque de Vicente Loriente' and 'Casino/Casa de Cultura' (early 20th century).
It has nine parishes (administrative divisions):