Villarcayo de Merindad de Castilla la Vieja
| Villarcayo de Merindad de Castilla la Vieja | |
|---|---|
| Coordinates: 42°56′21″N 3°34′19″W / 42.9391°N 3.5719°W | |
| Country | Spain | 
| Autonomous community | Castile and León | 
| Province | Burgos | 
| Municipality | Villarcayo de Merindad de Castilla la Vieja | 
| Area | |
|  • Total | 150 km2 (60 sq mi) | 
| Population  (2018) | |
|  • Total | 4,207 | 
| • Density | 28/km2 (73/sq mi) | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
Villarcayo de Merindad de Castilla la Vieja (Spanish pronunciation: [biʎaɾˈkaʝo ðe meɾinˈdað ðe kasˈtiʎa la ˈβjexa]) is a municipality located in the province of Burgos, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 4,031 inhabitants.