Berlanga de Duero is a municipality located in the province of Soria, in the autonomous region of Castile and León, Spain.

According to the 2017 census (conducted by the INE), the municipality has a population of 902 inhabitants.

Berlanga de Duero sits at 934 metres (3,064 ft) above sea level in the northeastern foothills of the Ayllón mountain range.

It has a continental Mediterranean climate, with long, cool winters—due in part to its altitude.

This article about a location in the province of Soria, Spain is a stub.