| Tamil Dialects | Country | Population |
| Vanniyan | India | 14,336,000 |
| Adi Dravida | India | 9,646,000 |
| Viswakarma unspecified | India | 8,652,000 |
| Maravan | India | 3,621,000 |
| Tamil (Muslim traditions) | India | 3,610,000 |
| Nadar (Hindu traditions) | India | 3,404,000 |
| Kaikolan | India | 2,793,000 |
| Pallan (Hindu traditions) | India | 2,756,000 |
| Paraiyan (Hindu traditions) | India | 2,473,000 |
| Vellalan unspecified | India | 2,033,000 |
| Tamil (Hindu traditions) | Malaysia | 2,014,000 |
| Nadar (Christian traditions) | India | 1,456,000 |
| Vellalar | Sri Lanka | 1,198,000 |
| Tamil (Muslim traditions) | Sri Lanka | 1,166,000 |
| Arunthathiyar | India | 1,151,000 |
| Kallan unspecified | India | 1,104,000 |
| Vaniyan | India | 1,073,000 |
| Chakkiliyan (Hindu traditions) | India | 967,000 |
| Navithan | India | 914,000 |
| Paraiyan (Christian traditions) | India | 881,000 |
| Bania Chetti | India | 828,000 |
| Agamudaiyan Nattaman | India | 745,000 |
| Adi Dravida Christian | India | 739,000 |
| Sri Lanka Moor | Sri Lanka | 697,000 |
| Vanniyan Agnikula | India | 663,000 |
| Brahmin Tamil | India | 529,000 |
| Pallan (Christian traditions) | India | 517,000 |
| Kallan Tondaman | India | 512,000 |
| Malayali | India | 420,000 |
| Kudumi | India | 330,000 |
| Brahmin Iyer | India | 324,000 |
| Agamudaiyan unspecified | India | 293,000 |
| Madari (Hindu traditions) | India | 292,000 |
| Panan | India | 264,000 |
| Vellalan Tondamandalam | India | 234,000 |
| Vellalan Nanjanad | India | 226,000 |
| Vellalan Nanchilnattu | India | 221,000 |
| Koviar | Sri Lanka | 216,000 |
| Shaikh | Sri Lanka | 206,000 |
| Ambattan (Hindu traditions) | India | 203,000 |
| Karaiyar | Sri Lanka | 199,000 |
| Vannan (Christian traditions) | India | 168,000 |
| Vellalan Sozhia | India | 165,000 |
| South Asian Tamil (Hindu traditions) | Myanmar (Burma) | 158,000 |
| Vellalan Isai | India | 158,000 |
| Brahmin Dravida | India | 139,000 |
| Chakkiliyan (Christian traditions) | India | 133,000 |
| Ilavan Christian | India | 133,000 |
| Valluvan | India | 132,000 |
| Vellalan Virakodi | India | 132,000 |
| Vannan (Hindu traditions) | India | 116,000 |
| Hill Pulayan | India | 114,000 |
| Tamil (Hindu traditions) | Singapore | 113,000 |
| Arwa Mala | India | 107,000 |
| Paraiyan (Hindu traditions) | Sri Lanka | 105,000 |
| Vanniyan Kamakshiamma | India | 105,000 |
| Vanniyar | Sri Lanka | 103,000 |
| Maravan | Sri Lanka | 102,000 |
| Devendrakulathan | India | 98,000 |
| Tamil (Hindu traditions) | United States | 93,000 |
| Maravar | Sri Lanka | 88,000 |
| Kavara | India | 87,000 |
| Idayan | India | 81,000 |
| Kaikolan | Sri Lanka | 81,000 |
| Tamil (Hindu traditions) | Fiji | 81,000 |
| Tamil | Australia | 78,000 |
| Kattunayakan | India | 75,000 |
| Primanar | Sri Lanka | 74,000 |
| Tamil (Hindu traditions) | Saudi Arabia | 74,000 |
| Paraiyar | Sri Lanka | 72,000 |
| Pallar | Sri Lanka | 71,000 |
| Ilavan | Sri Lanka | 70,000 |
| Vetan (Hindu traditions) | India | 68,000 |
| Brahmin Sholiar | India | 54,000 |
| Malayan, tribe | India | 52,000 |
| Vanniyan Thigala | India | 52,000 |
| Sayyid | Sri Lanka | 50,000 |
| Brahmin Vadama | India | 49,000 |
| Pondicherry Catholic | India | 49,000 |
| Tamil (Christian traditions) | Reunion | 49,000 |
| Vellalan Mudaliar | India | 48,000 |
| Chayakkaran | India | 47,000 |
| Pallan (Hindu traditions) | Sri Lanka | 47,000 |
| Mutali | India | 46,000 |
| Nalavar | Sri Lanka | 45,000 |
| Bharathar (Christian traditions) | India | 43,000 |
| Mukkuvar | Sri Lanka | 43,000 |
| Paravan (Christian traditions) | India | 42,000 |
| Pashtun, Pathan | Sri Lanka | 42,000 |
| Brahmin Ashtashasram | India | 40,000 |
| Panikkan | India | 40,000 |
| Vanniyan Kalingi | India | 40,000 |
| Chackaravar | India | 38,000 |
| Tamil (Hindu traditions) | Bahrain | 37,000 |
| Vanniyan | Sri Lanka | 37,000 |
| Kudumban | India | 36,000 |
| Tamil (Hindu traditions) | Thailand | 36,000 |
| Tamil, Jaffna | Malaysia | 35,000 |
| Puthirai Vannan | India | 34,000 |
| Tamil (Hindu traditions) | Germany | 34,000 |
| Palla | Sri Lanka | 33,000 |
| Panna | Sri Lanka | 33,000 |
| Tamil (Hindu traditions) | South Africa | 33,000 |
| Brahmin Indian Tamil | Sri Lanka | 32,000 |
| Vellalan | Sri Lanka | 31,000 |
| Tamil (Hindu traditions) | Italy | 29,000 |
| Brahmin Mukkaniyar | India | 28,000 |
| Tamil (Hindu traditions) | Canada | 28,000 |
| Chakkiliyan (Hindu traditions) | Sri Lanka | 27,000 |
| Nadar (Hindu traditions) | Sri Lanka | 26,000 |
| Tamil (Hindu traditions) | Qatar | 26,000 |
| Vannan (Hindu traditions) | Sri Lanka | 26,000 |
| Samban | India | 25,000 |
| Kavathi | India | 23,000 |
| Malakkuravan | India | 23,000 |
| Vellalan Kongu | India | 23,000 |
| Navithan | Sri Lanka | 22,000 |
| Tamil | Netherlands | 21,000 |
| Thimilar | Sri Lanka | 21,000 |
| Kallan | Sri Lanka | 18,000 |
| Vaniyan | Sri Lanka | 18,000 |
| Vanniyan Kotton | India | 18,000 |
| Boya | Sri Lanka | 17,000 |
| Kuravan (Christian traditions) | India | 17,000 |
| Navait | Sri Lanka | 17,000 |
| Vannar | Sri Lanka | 17,000 |
| Ambalavasi | Sri Lanka | 16,000 |
| Ambattan | Sri Lanka | 16,000 |
| Kadaiyar | India | 16,000 |
| Paraiyan (Christian traditions) | Sri Lanka | 16,000 |
| Bakuda | India | 15,000 |
| Bharathar (Hindu traditions) | India | 14,000 |
| Ambalavasi Tottiyan Naicker | India | 13,000 |
| Panniandi | India | 12,000 |
| Tamil (Hindu traditions) | Oman | 12,000 |
| Dhobi (Hindu traditions) | Sri Lanka | 11,000 |
| Ilavan Christian | Sri Lanka | 11,000 |
| Malasar | India | 11,000 |
| Paliyan | India | 11,000 |
| Tamil (Hindu traditions) | New Zealand | 11,000 |
| Vellalan Pattanavan | India | 11,000 |
| Bania unspecified | Sri Lanka | 10,000 |
| Vathiriyan (Hindu traditions) | India | 10,000 |
| Agamudaiyan unspecified | Sri Lanka | 9,900 |
| Indian Tamil | Sri Lanka | 9,900 |
| Tamil (Hindu traditions) | Vietnam | 9,900 |
| Agamudaiyan Udayar | India | 9,800 |
| Koliyan | India | 9,800 |
| Sri Lankan Tamil | Sri Lanka | 9,600 |
| Idayan | Sri Lanka | 9,500 |
| Pagadai | India | 9,300 |
| Nadar (Christian traditions) | Sri Lanka | 9,200 |
| Marakkalage | Sri Lanka | 9,000 |
| Agamudaiyan Nattaman | Sri Lanka | 8,800 |
| Alavan | India | 8,800 |
| Eravallan | India | 8,800 |
| Osta (Nasuva) | Sri Lanka | 8,300 |
| Pannadi | India | 8,200 |
| Yadav (Hindu traditions) | Sri Lanka | 7,500 |
| Viswakarma | Sri Lanka | 7,400 |
| Palliyan | India | 7,100 |
| Pallan (Christian traditions) | Sri Lanka | 7,000 |
| Tamil (Christian traditions) | Martinique | 6,800 |
| Palliyar | India | 6,600 |
| Bania Chetti | Sri Lanka | 6,400 |
| Kumhar, Kusavar (Hindu traditions) | Sri Lanka | 6,400 |
| Sonar (Hindu traditions) | Sri Lanka | 6,400 |
| Sri Lanka Chetti | Sri Lanka | 6,400 |
| Tattar | Sri Lanka | 6,000 |
| Vettakkaran | India | 6,000 |
| Vathiriyan (Christian traditions) | India | 5,800 |
| Maniyattikkaran | India | 5,700 |
| Semman | India | 5,600 |
| Bandi (Hindu traditions) | India | 5,500 |
| Brahmin Christian | India | 5,500 |
| Chackaravar Christian | India | 5,500 |
| Ambattan Christian | India | 5,100 |
| Panan | Sri Lanka | 5,100 |
| Hajam | Sri Lanka | 5,000 |
| Chakkiliyan (Christian traditions) | Sri Lanka | 4,900 |
| Teli (Hindu traditions) | Sri Lanka | 4,800 |
| Brahmin unspecified | Sri Lanka | 4,700 |
| Pulayan | Sri Lanka | 4,700 |
| Kavathi Christian | India | 4,600 |
| Kuravan (Hindu traditions) | Sri Lanka | 4,100 |
| Nair | Sri Lanka | 4,100 |
| East Indian | Guadeloupe | 3,800 |
| Sali Pattariyan | India | 3,800 |
| Vannan (Christian traditions) | Sri Lanka | 3,800 |
| Kasar (Hindu traditions) | Sri Lanka | 3,500 |
| Sali, Seriyar | Sri Lanka | 3,400 |
| Silpi | Sri Lanka | 3,400 |
| Ambalavasi Kambalattu | India | 3,200 |
| Thacher | Sri Lanka | 3,200 |
| Valluvan | Sri Lanka | 3,100 |
| Vettar | Sri Lanka | 3,100 |
| Thanakavar | Sri Lanka | 2,500 |
| Agamudaiyan Mukkulattar | India | 2,400 |
| Bharathar (Christian traditions) | Sri Lanka | 2,300 |
| Palliwilli | Sri Lanka | 2,300 |
| Palleyan | India | 2,200 |
| Kuda Korava | India | 2,100 |
| Mudugar | India | 2,100 |
| Paravan (Hindu traditions) | Sri Lanka | 1,800 |
| Tiruvalluvar | India | 1,800 |
| Vettuvan Gounder | India | 1,700 |
| Malakuravan | India | 1,400 |
| Samban | Sri Lanka | 1,400 |
| Kepmaris | India | 1,200 |
| Koviyar | Sri Lanka | 1,200 |
| Patnulkaran | India | 1,200 |
| Sayankulam | India | 1,200 |
| Semman | Sri Lanka | 1,200 |
| Tamil (Hindu traditions) | Mauritius | 1,200 |
| Mukkuvan (Hindu traditions) | Sri Lanka | 1,100 |
| Tholuva Naicker | India | 1,000 |
| Tamil | Maldives | 800 |
| Bharathar (Hindu traditions) | Sri Lanka | 600 |