चेन्नई मधील एखाद्या नागरिकाला चेन्नईकर म्हणतात. इ.स. २००१ मध्ये चेन्नईची लोकसंख्या ४३४ लाख होती, तर महानगरीय लोकसंख्या ७०४ लाख होती. The estimated metropolitan population in 2006 is 4.5 million. In 2001, the population density in the city was 24,682 per km (63,926 per mi²), while the population density of the metropolitan area was 5,922 per km (15,337 per mi²), making it one of the most densely populated cities in the world. The sex ratio is 951 females for every 1,000 males, slightly higher than the national average of 944. The average literacy rate is 80.14%, much higher than the national average of 64.5%. The city has the fourth highest population of slum dwellers among major cities in India, with about 820,000 people (18.6% of its population) living in slum conditions. This number represents about 5% of the total slum population of India. In 2005, the crime rate in the city was 313.3 per 100,000 people, accounting for 6.2% of all crimes reported in major cities in India. The number of crimes in the city showed a significant increase of 61.8% from 2004.

चेन्नईमधील सर्वाधिक लोक तमिळभाषी आहेत. भारतीय इंग्रजी ही चेन्नई मधील व्यापार, शैक्षणिक आणि पांढर पेशी जनतेमध्ये प्रचलित असल्याचे दिसून येते. पुष्कळ संख्येने तेलगू and मल्यालम समाज चेन्नईत राहतो. Chennai also has a large migrant population, who come from other parts of Tamil Nadu and the rest of the country. As of 2001, out of the 937,000 migrants (21.57% of its population) in the city, 74.5% were from other parts of the state, 23.8% were from rest of India and 1.7% were from outside the country.


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लोकसंख्याशास्त्र
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