As of the 2011 Census of India, the urban agglomeration of Ranchi had a population of approximately 1.07 million, though estimates suggest this number has grown significantly over the last decade due to urbanization and inward migration from smaller districts.
Ranchi is highly diverse, hosting a harmonious mix of indigenous tribal communities (such as the Munda, Oraon, and Santhal peoples) and non-tribal populations (commonly referred to locally as Sadans) alongside migrants from Bihar, West Bengal, and other parts of India. Hinduism is the majority religion, followed by Sarnaism (the traditional indigenous religion), Islam, and Christianity.
Hindi is the most widely spoken language and the official language of the state. However, regional languages and dialects such as Nagpuri, Kurukh, Mundari, and Bengali are vital components of the city's cultural tapestry. The city boasts a relatively high literacy rate, hovering around 87% within the urban municipal limits.

