In Sri Lanka most common or majority peoples religion is Buddhists. Tamilans were also there in Sri Lanka but they are in minority and sinhalese were in majority so their religion was taken as official language as also.

Introduction:
Sri Lanka is a diverse country with various ethnic and religious communities. The majority community in Sri Lanka is the Sinhalese, who make up around 74% of the population. The remaining population consists of Tamils, Moors, Burghers, Malays, and other minority groups.

Sinhalese Community:
The Sinhalese community is the largest ethnic group in Sri Lanka and is predominantly found in the lowlands of the country. The Sinhalese people mainly speak Sinhala and follow Theravada Buddhism as their religion. They have a rich cultural heritage, including traditional dance, music, and art forms. The Sinhalese community has played a significant role in shaping the history, politics, and culture of Sri Lanka.

Tamil Community:
The Tamil community is the second-largest ethnic group in Sri Lanka, constituting around 15% of the population. Tamils are primarily concentrated in the northern and eastern regions of the country. They speak Tamil and follow Hinduism, although there is a significant Christian minority among Tamils as well. The Tamil community has its own distinct cultural practices, including classical music and dance forms.

Moors Community:
The Moors, also known as Sri Lankan Muslims, form a significant minority community in Sri Lanka, accounting for approximately 9% of the population. The Moors are primarily found in the coastal areas and major cities of the country. They are predominantly Tamil-speaking and follow Islam as their religion. The Moors have a unique cultural identity influenced by both Arab and South Asian traditions.

Other Minority Communities:
Aside from the major communities mentioned above, Sri Lanka is also home to various other minority groups. This includes the Burghers, who are of mixed European and Sri Lankan descent and have a distinct culture influenced by their colonial heritage. Malays, who have a history of migration from Southeast Asia, have also contributed to the multicultural fabric of Sri Lanka.

Conclusion:
The majority community in Sri Lanka is the Sinhalese, comprising around 74% of the population. However, the country is also home to diverse ethnic and religious communities such as Tamils, Moors, Burghers, and Malays. These communities contribute to the cultural diversity and richness of Sri Lanka, making it a unique and vibrant nation.