The population of Cajatambo was estimated in 1896 to be roughly 6,000 people, although roughly 15 years later the
Encyclopædia Britannica Eleventh Edition put the population at closer to 4,500. In recent decades many people have migrated to places with better opportunities and services, such as the city of
Lima. Spanish is the language which the majority of the population (80%) learnt to speak in childhood, followed by Quechua (19%). The variety of Quechua spoken in the area is the Cajatambo Quechua (part of the Central Quechua "Wankay"), a
Quechua I dialect which shares 74% intelligibility with the neighboring Huamalies Quechua. == Toponymy ==