As of the 2011 Census, Tinsukia city proper had a population of approximately 99,448, while its Urban Agglomeration reached about 126,389. The population has grown steadily over the last decade, driven by commercial opportunities.
Tinsukia is remarkably cosmopolitan for its size. The population is a diverse mix of native Assamese, the historically significant tea-tribe communities, Bengali Hindus and Muslims, a large Marwari business community, and Hindi-speaking migrants from states like Bihar and Uttar Pradesh.
Hinduism is the majority religion, followed by significant populations of Muslims, Christians, Sikhs, and Jains. The literacy rate in Tinsukia is high, exceeding 87% for both males and females in the urban center. The primary languages spoken are Assamese, Bengali, Hindi, and local dialects like Sadri (spoken in the tea gardens).
