Tamil Malaysians, also known as Malaysian Tamilar, are people of full or partial Tamil descent who were born in or immigrated to Malaysia from Tamil Nadu, India and the Tamil regions of north-east Sri Lanka. The majority of 1.8–2 million people 80% of the Malaysian Indian populations in Malaysia were from Indian Tamil ethnic groups from Tamil Nadu and Sri Lanka. The bulk of Tamil Malaysian migration began during the British Raj, when Britain facilitated the migration of Indian workers to work in plantations. There are, however, some established Tamil communities from before British colonialism.

Malaysian Malayalees, also known as Malayalee Malaysians, are people of Malayali descent who were born in or immigrated to Malaysia from the Malayalam speaking regions of Kerala. They are the second largest Indian ethnic group, making up approximately 15% of the Malaysian Indian population. The bulk of Malaysian Malayali migration began during the British Raj, when the British facilitated the migration of Indian workers to work in plantations, but unlike the majority Tamils, the vast majority of the Malayalis were recruited as supervisors in the oil palm estates that followed the kangani system, and some were into trading and small businesses with a significant proportion of them running groceries or restaurants. Over 90% of the Malayalee population in Malaysia are Malaysian citizens.