The Sri Lankan Tamil dialects or Ceylon Tamil or commonly in Tamil language Eelam Tamil are a group of Tamil dialects used in Sri Lanka by its native Tamil speakers that is distinct from the dialects of Tamil spoken in Tamil Nadu. It is broadly categorized into three sub groups: Jaffna Tamil, Batticaloa Tamil, and Negombo Tamil dialects. But there are a number of sub dialects within these broad regional dialects as well. These dialects are also used by ethnic groups other than Tamils and Muslims such as Sinhalese people, Portuguese Burghers and the indigenous Coastal Vedda people.

Tamil is a Dravidian language natively spoken by the Tamil people of South Asia. Tamil is an official language of the Indian state of Tamil Nadu and union territory of Puducherry, and the sovereign nations of Sri Lanka and Singapore. Tamil is also spoken by significant minorities in the four other South Indian states of Kerala, Karnataka, Andhra Pradesh and Telangana, and the Union Territory of the Andaman and Nicobar Islands. It is also spoken by the Tamil diaspora found in many countries, including Malaysia, Myanmar, South Africa, United Kingdom, United States, Canada, Australia, New Zealand, United Arab Emirates, Saudi Arabia, France, Germany, Italy, Indonesia, and Mauritius. Tamil is also natively spoken by the Sri Lankan Moors. One of 22 scheduled languages in the Constitution of India, Tamil was the first to be classified as a classical language of India.