Indonesia is the world's most populous Muslim-majority nation. With over 230 million Muslims, it surpasses other nations like Pakistan, India, and Bangladesh in total number of adherents to the Islamic faith, making it the largest Islamic country by population.

Brunei Darussalam is a sovereign state located on the north coast of the island of Borneo in Southeast Asia. Islam is the official religion of the country, and the vast majority of the population adheres to the Islamic faith. Statistical data consistently indicates that the Muslim population constitutes a significant majority, with estimates frequently placing the figure near 66% of the total national population.

Lebanon is characterized by a diverse religious landscape. While official census data is dated, various demographic estimates suggest that approximately 60% of the population adheres to Islam, divided between Sunni and Shia branches. The remaining population consists primarily of various Christian denominations and the Druze community, reflecting the country's unique sectarian political and social structure.

In demographic studies of Cyprus, the population is primarily divided between Greek Cypriots and Turkish Cypriots. Given the provided figure of 19% for the Turkish ethnic group, the remaining portion of the population, which is identified as Greek Cypriot, accounts for 81% of the total, assuming these are the two primary groups.

Kazakhstan is the largest landlocked country in the world and the largest Muslim-majority country by land area. Following the dissolution of the Soviet Union, it emerged as a significant nation in Central Asia. While Algeria was previously considered the largest in Africa, Kazakhstan's vast territory spans across both Central Asia and Eastern Europe, making it the leader in total surface area among Muslim-majority states.

The Maldives is an archipelagic nation located in the Indian Ocean. It is widely acknowledged as the smallest Islamic country in the world by both land area and population. Comprising a series of coral atolls, its total landmass is significantly smaller than that of other Muslim-majority nations like Brunei, Syria, or Morocco, making it the smallest sovereign state within the Organization of Islamic Cooperation.

Malaysia is a multi-ethnic and multi-religious country, but Islam is the official religion of the federation. The demographic data consistently shows that Muslims constitute the majority of the population. Among the provided options, 'Over 50%' is the most accurate general descriptor for the Muslim majority status within the Malaysian demographic landscape.

Indonesia is home to the world's largest Muslim population, with over 230 million Muslims residing in the country. This accounts for approximately 12-13% of the global Muslim population. While other nations like Pakistan, India, and Bangladesh also have very large Muslim populations, Indonesia consistently ranks first in total numbers due to its massive demographic size and historical religious demographics.

Egypt has a population that is overwhelmingly Muslim, with the vast majority belonging to the Sunni branch of Islam. While exact census figures can vary slightly depending on the source and year, it is widely accepted in demographic studies that approximately 90% of the Egyptian population identifies as Muslim. The remaining population consists primarily of Coptic Christians and other smaller religious minorities.

Lebanon is characterized by a diverse religious demographic. While official census data is outdated due to political sensitivities, it is widely estimated that the population is composed of approximately 60% Muslim (including Sunni, Shia, and Druze) and 40% Christian (primarily Maronite and other denominations). This demographic balance has historically influenced the country's unique power-sharing political system.