The Sinhalese are the largest ethnic group in the country, officially comprising 11 million people or 74 percent of the population in 1981. They are distinguished primarily by their language, Sinhala, which is a member of the Indo-European linguistic group that includes Hindi and other north Indian tongues as well as most of the languages of Europe. It is likely that groups from north India introduced an early form of Sinhala when they migrated to the island around 500 B.C., bringing with them the agricultural economy that has remained dominant to the twentieth century. From early times, however, Sinhala has included a large number of loan words and constructs from Tamil, and modern speech includes many expressions from European languages, especially English. The Sinhalese claim to be descendants of Prince Vijaya and his band of immigrants from northern India, but it is probable that the original group of Sinhalese immigrants intermarried with indigenous inhabitants (see Ancient Legends and Chronicles , ch. 1). The Sinhalese gradually absorbed a wide variety of castes or tribal groups from the island and from southern India during the last 2,500 years.

The Buddhist religion reinforces the solidarity of the Sinhalese as an ethnic community. In 1988 approximately 93 percent of the Sinhala speakers were Buddhists, and 99.5 percent of the Buddhists in Sri Lanka spoke Sinhala. The most popular Sinhalese folklore, literature, and rituals teach children from an early age the uniqueness of Buddhism in Sri Lanka, the long relationship between Buddhism and the culture and politics of the island, and the importance of preserving this fragile cultural inheritance. Buddhist monks are accorded great respect and participate in services at the notable events in people's lives. To become a monk is a highly valued career goal for many young men. The neighboring Buddhist monastery or shrine is the center of cultural life for Sinhalese villagers (see Buddhism , this ch.).

Their shared language and religion unite all ethnic Sinhalese, but there is a clear difference between the "Kandyan" and the "low-country" Sinhalese. Because the Kingdom of Kandy in the highlands remained independent until 1818, conservative cultural and social forms remained in force there. English education was less respected, and traditional Buddhist education remained a vital force in the preservation of Sinhalese culture. The former Kandyan nobility retained their social prestige, and caste divisions linked to occupational roles changed slowly. The plains and the coast of Sri Lanka, on the other hand, experienced great change under 400 years of European rule. Substantial numbers of coastal people, especially among the Karava (see Glossary) caste, converted to Christianity through determined missionary efforts of the Portuguese, Dutch, and British 66 percent of the Roman Catholics and 43 percent of the Protestants in the early 1980s were Sinhalese. So383 Social mobility based on economic opportunity or service to the colonial governments allowed entire caste or kin groups to move up in the social hierarchy. The old conceptions of noble or servile status declined, and a new elite developed on the basis of its members' knowledge of European languages and civil administration. The Dutch legal system changed traditional family law. A wider, more cosmopolitan outlook differentiated the low-country Sinhalese from the more "old fashioned" inhabitants of highlands (see Caste , this ch.).

Data as of October 1988