Northern Province, Sri Lanka in the context of "Sri Lankan Moors"

Tamil Nadu is the southernmost state of India. The tenth largest Indian state by area and the sixth largest by population, Tamil Nadu is the home of the Tamil people, who speak the Tamil language—the state's official language and the first to be recognised as a classical language in India. The capital and largest city is Chennai.

Located on the south-eastern coast of the Indian peninsula, Tamil Nadu is straddled by the Western Ghats and Deccan Plateau in the west, the Eastern Ghats in the north, the Eastern Coastal Plains lining the Bay of Bengal in the east, the Gulf of Mannar and the Palk Strait to the south-east, the Laccadive Sea at the southern cape of the peninsula, with the river Kaveri bisecting the state. Politically, Tamil Nadu is bound by the Indian states of Kerala, Karnataka, and Andhra Pradesh, and encloses a part of the union territory of Puducherry. It shares an international maritime border with the Northern Province of Sri Lanka at Pamban Island.

Palk Strait is a strait between the Indian state of Tamil Nadu and Northern Province of Sri Lanka. It connects the Palk Bay in the Bay of Bengal in the north with the Gulf of Mannar in the Laccadive Sea in the south. It stretches for about 137 km (85 mi) and is 64 to 137 km (40 to 85 mi) wide. It is named after Robert Palk, who was a governor of Madras (1755–1763) during the Company Raj period.

Several rivers including the Vaigai flow into the strait. The strait consists of many islands and is interspersed with a chain of low islands and reef shoals that are collectively called Ram Setu or Adam's Bridge. The shallow waters and reefs make it difficult for large ships to pass through, although fishing boats and small craft navigate the waters. Dredging the sea to make it deeper for navigation and plans for a bridge over the waters have been proposed.

Sri Lankan Tamils (Tamil: இலங்கை தமிழர், ilankai tamiḻar or ஈழத் தமிழர், īḻat tamiḻar), also known as Ceylon Tamils or Eelam Tamils, are Tamils native to the South Asian island state of Sri Lanka. Today, they constitute a majority in the Northern Province, form the plurality in the Eastern Province and are in the minority throughout the rest of the country. 70% of Sri Lankan Tamils in Sri Lanka live in the Northern and Eastern provinces.

Modern Sri Lankan Tamils descend from residents of the Jaffna kingdom, a former kingdom in the north of Sri Lanka and Vanni chieftaincies from the east. According to the anthropological and archaeological evidence, Sri Lankan Tamils have a very long history in Sri Lanka and have lived on the island since at least around the 2nd century BCE.

Indian Tamils of Sri Lanka are Tamil people of Indian origin in Sri Lanka. They are also known as Malayaga Tamilar,Hill Country Tamils, Up-Country Tamils or simply Indian Tamils. They predominantly descend from workers sent during the British Raj from Southern India to Sri Lanka in the 19th and 20th centuries to work in coffee, tea and rubber plantations. Some also migrated on their own as merchants and as other service providers. These Tamil speakers mostly live in the central highlands, also known as the Malayakam or Hill Country, yet others are also found in major urban areas and in the Northern Province. Although they are all termed as Tamils today, some have Telugu and Malayalee origins as well as diverse South Indian caste origins. They are instrumental in the plantation sector economy of Sri Lanka. In general, socio-economically their standard of living is below that of the national average and they are described as one of the poorest and most neglected groups in Sri Lanka. In 1964 a large percentage were repatriated to India, but left a considerable number as stateless people. By the 1990s most of these had been given Sri Lankan citizenship. Most are Hindus with a minority of Christians and Muslims amongst them. There are also a small minority followers of Buddhism among them. Politically they are supportive of trade union-based political parties that have supported most of the ruling coalitions since the 1980s.

The Tamils in Sri Lanka can be divided into two groups, the Sri Lankan Tamils, who are native to the island of Sri Lanka and the Indian Tamils or Hill Country Tamils, who are descendants of bonded labourers sent from Tamil Nadu to Sri Lanka in the 19th century to work in tea plantations. Many came as laborers to work in the plantations, but few of them came as business people. Most of the recruits came as they were recruited by the head man in their villages, mostly by high caste Tamils.

The Eastern Province (Sinhala: නැගෙනහිර පළාත Næ̆gĕnahira Paḷāta , Tamil: கிழக்கு மாகாணம் Kiḻakku Mākāṇam) is one of the nine provinces of Sri Lanka, the first level administrative division of the country. The provinces have existed since the 19th century but did not have any legal status until 1987 when the 13th Amendment to the Constitution of Sri Lanka established provincial councils. Between 1988 and 2006 the province was temporarily merged with the Northern Province to form the North Eastern Province. The capital of the province is Trincomalee. Kalmunai is the largest and most populous city of Eastern Province.

Hinduism is one of Sri Lanka's oldest religions. As of 2011, Hindus made up 12.6% of the Sri Lankan population. They are almost exclusively Tamils, except for small immigrant communities from India and Pakistan (including the Sindhis, Telugus and Malayalis), and the Balinese community.

According to the 1915 census, Hindus made up about 25% of the Sri Lankan population (including indentured labourers brought by the British). Hinduism predominates in the Northern and Eastern Provinces (where Tamils remain the largest demographic), the central regions and Colombo, the capital. According to the 2011 census, there are 2,554,606 Hindus in Sri Lanka (12.6% of the country's population). During the Sri Lankan Civil War, many Tamils emigrated; Hindu temples, built by the Sri Lankan Tamil diaspora, maintain their religion, tradition, and culture.