The population of the districts in the State of Tamil Nadu by census years. Name Population Census 1991-03-01 Population Census 2001-03-01 Population Census 2011-03-01 Ariyalur 636,400 695,524 754,894 Chennai 3,841,396 4,343,645 4,646,732 Coimbatore 2,493,700 2,916,620 3,458,045 Cuddalore 2,122,759 2,285,395 2,605,914 Dharmapuri 1,123,600 1,295,182 1,506,843 Dindigul 1,760,601 1,923,014 2,159,775 Erode 1,802,900 2,016,582 2,251,744 Kanchipuram ( Kancheepuram ) 2,415,000 2,877,468 3,998,252 Kanniyakumari ( Kanyakumari ) 1,600,349 1,676,034 1,870,374 Karur 854,162 935,686 1,064,493 Krishnagiri 1,305,100 1,561,118 1,879,809 Madurai 2,400,339 2,578,201 3,038,252 Nagapattinam 1,377,700 1,488,839 1,616,450 Namakkal 1,322,715 1,493,462 1,726,601 Perambalur 451,000 493,646 565,223 Pudukkottai 1,327,148 1,459,601 1,618,345 Ramanathapuram 1,119,100 1,187,604 1,353,445 Salem 2,573,667 3,016,346 3,482,056 Sivaganga 1,103,100 1,155,356 1,339,101 Thanjavur 2,05...