| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Cannanpalaiyam | city | State of Tamil Nadu | India | 13.0955556 | 79.9661111 | 134 | 109821 |
| Cannanpālaiyam | city | State of Tamil Nadu | India | 13.0955556 | 79.9661111 | 134 | 109821 |
| Cape Comorin | city | State of Tamil Nadu | India | 8.0833333 | 77.5666667 | 0 | 43851 |
| Chaeur | city | State of Tamil Nadu | India | 12.3480556 | 80.047222 | 52 | 43152 |
| Chattrappatti | city | State of Tamil Nadu | India | 10.4833333 | 77.6666667 | 1233 | 41118 |
| Chelavaram | city | State of Tamil Nadu | India | 13.2380556 | 80.1605556 | 65 | 103281 |
| Chengalpat | city | State of Tamil Nadu | India | 12.7 | 79.9833333 | 118 | 99210 |
| Chengalpattu | city | State of Tamil Nadu | India | 12.7 | 79.9833333 | 118 | 99210 |
| Chengam | city | State of Tamil Nadu | India | 12.3 | 78.8 | 892 | 37654 |
| Chennai | city | State of Tamil Nadu | India | 13.0833333 | 80.2833333 | 29 | 3409086 |
| Chennimalai | city | State of Tamil Nadu | India | 11.1666667 | 77.6166667 | 1082 | 48339 |
| Chepauk | city | State of Tamil Nadu | India | 13.0594444 | 80.2788889 | 45 | 3409086 |
| Cherambadi | city | State of Tamil Nadu | India | 11.5333333 | 76.2833333 | 2956 | 42720 |
| Cherambādi | city | State of Tamil Nadu | India | 11.5333333 | 76.2833333 | 2956 | 42720 |
| Cheranmahadevi | city | State of Tamil Nadu | India | 8.6833333 | 77.5666667 | 206 | 55032 |
| Cheranmahādevi | city | State of Tamil Nadu | India | 8.6833333 | 77.5666667 | 206 | 55032 |
| Cherian Nagar North | city | State of Tamil Nadu | India | 13.14 | 80.3 | 0 | 897075 |
| Cherian Nagar South | city | State of Tamil Nadu | India | 13.1377778 | 80.2991667 | 0 | 897075 |
| Chetpat | city | State of Tamil Nadu | India | 13.07 | 80.2408333 | 49 | 4338523 |
| Chetpet | city | State of Tamil Nadu | India | 13.07 | 80.2408333 | 49 | 4338523 |
| Chetput | city | State of Tamil Nadu | India | 12.4666667 | 79.35 | 518 | 55555 |
| Chetput | city | State of Tamil Nadu | India | 13.07 | 80.2408333 | 49 | 4338523 |
| Chettikulam | city | State of Tamil Nadu | India | 8.15 | 77.6 | 13 | 44877 |
| Chettipalaiyam | city | State of Tamil Nadu | India | 10.9 | 77.0666667 | 1095 | 90000 |
| Chettipalayam | city | State of Tamil Nadu | India | 10.9 | 77.0666667 | 1095 | 90000 |
| Chettippattu | city | State of Tamil Nadu | India | 13.0166667 | 80.0166667 | 78 | 82001 |
| Chettipālaiyam | city | State of Tamil Nadu | India | 10.9 | 77.0666667 | 1095 | 90000 |
| Cheyur | city | State of Tamil Nadu | India | 12.3480556 | 80.047222 | 52 | 43152 |
| Cheyyar | city | State of Tamil Nadu | India | 12.6666667 | 79.55 | 328 | 46738 |
| Cheyyur | city | State of Tamil Nadu | India | 12.3480556 | 80.047222 | 52 | 43152 |
| Cheyyūr | city | State of Tamil Nadu | India | 12.3480556 | 80.047222 | 52 | 43152 |
| Cheyūr | city | State of Tamil Nadu | India | 12.3480556 | 80.047222 | 52 | 43152 |
| Chidambaram | city | State of Tamil Nadu | India | 11.4 | 79.7 | 9 | 66713 |
| Chingleput | city | State of Tamil Nadu | India | 12.7 | 79.9833333 | 118 | 99210 |
| Chinmaya Nagar | city | State of Tamil Nadu | India | 13.0516667 | 80.1944444 | 62 | 2813515 |
| Chinna Dharapuram | city | State of Tamil Nadu | India | 10.85 | 77.8666667 | 534 | 43672 |
| Chinna Dhārāpuram | city | State of Tamil Nadu | India | 10.85 | 77.8666667 | 534 | 43672 |
| Chinna Salem | city | State of Tamil Nadu | India | 11.65 | 78.9 | 413 | 48242 |
| Chinnakudal | city | State of Tamil Nadu | India | 13.0744444 | 80.2216667 | 45 | 4338523 |
| Chinnamanur | city | State of Tamil Nadu | India | 9.8333333 | 77.3833333 | 1230 | 58302 |
| Chinnamanūr | city | State of Tamil Nadu | India | 9.8333333 | 77.3833333 | 1230 | 58302 |
| Chinnammanur | city | State of Tamil Nadu | India | 9.8333333 | 77.3833333 | 1230 | 58302 |
| Chinnasekkadu | city | State of Tamil Nadu | India | 13.1652778 | 80.26 | 36 | 1610870 |
| Chintadripet | city | State of Tamil Nadu | India | 13.0744444 | 80.2713889 | 26 | 3409086 |
| Chitdambaram | city | State of Tamil Nadu | India | 11.4 | 79.7 | 9 | 66713 |
| Chittambalam | city | State of Tamil Nadu | India | 10.9666667 | 77.2833333 | 1076 | 59512 |
| Chittamur | city | State of Tamil Nadu | India | 12.4166667 | 79.9 | 200 | 76413 |
| Chittāmūr | city | State of Tamil Nadu | India | 12.4166667 | 79.9 | 200 | 76413 |
| Cholapuram | city | State of Tamil Nadu | India | 9.3666667 | 77.5833333 | 403 | 81532 |
| Cholavandan | city | State of Tamil Nadu | India | 10.0166667 | 77.9666667 | 419 | 97139 |
| Cholavandān | city | State of Tamil Nadu | India | 10.0166667 | 77.9666667 | 419 | 97139 |
| Cholavaram | city | State of Tamil Nadu | India | 13.2380556 | 80.1605556 | 65 | 103281 |
| Choolai | city | State of Tamil Nadu | India | 13.0897222 | 80.2688889 | 29 | 2970775 |
| Choolai Medu | city | State of Tamil Nadu | India | 13.0577778 | 80.2266667 | 59 | 4338523 |
| Chromepet | city | State of Tamil Nadu | India | 12.95 | 80.1333333 | 91 | 178002 |
| Chrompet | city | State of Tamil Nadu | India | 12.95 | 80.1333333 | 91 | 178002 |
| Chunampet | city | State of Tamil Nadu | India | 12.2666667 | 79.9166667 | 75 | 68818 |
| Chunampettai | city | State of Tamil Nadu | India | 12.2666667 | 79.9166667 | 75 | 68818 |
| Chūnāmpettai | city | State of Tamil Nadu | India | 12.2666667 | 79.9166667 | 75 | 68818 |
| Cikal | city | State of Tamil Nadu | India | 11.2333333 | 79.7333333 | 13 | 99618 |
| Coilnapatam | city | State of Tamil Nadu | India | 8.5666667 | 78.1166667 | 19 | 62144 |
| Coimbatore | city | State of Tamil Nadu | India | 11 | 76.9666667 | 1246 | 180902 |
| Comorin | city | State of Tamil Nadu | India | 8.0833333 | 77.5666667 | 0 | 43851 |
| Conjeeveram | city | State of Tamil Nadu | India | 12.8333333 | 79.7166667 | 282 | 130049 |
| Conjevaram | city | State of Tamil Nadu | India | 12.8333333 | 79.7166667 | 282 | 130049 |
| Conjeveram | city | State of Tamil Nadu | India | 12.8333333 | 79.7166667 | 282 | 130049 |
| Coonoor | city | State of Tamil Nadu | India | 11.35 | 76.8166667 | 4927 | 99120 |
| Courtalam | city | State of Tamil Nadu | India | 8.9166667 | 77.2833333 | 725 | 83078 |
| Courtallam | city | State of Tamil Nadu | India | 8.9166667 | 77.2833333 | 725 | 83078 |
| Covelong | city | State of Tamil Nadu | India | 12.7877778 | 80.2494444 | 0 | 67619 |
| Cuddalore | city | State of Tamil Nadu | India | 11.75 | 79.75 | 3 | 102451 |
| Cuvaimalai | city | State of Tamil Nadu | India | 10.95 | 79.3333333 | 82 | 124341 |
| Cīkāl | city | State of Tamil Nadu | India | 11.2333333 | 79.7333333 | 13 | 99618 |
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