The U.S. government estimates the total population at 6.0 million (midyear 2020 estimate). According to government estimates, approximately 90 percent of the population is Muslim, the vast majority of whom are Sunni. The government estimates Shia make up less than 1 percent of the Muslim population. There is also a small Ahmadi Muslim community not reflected in government figures and estimated by an international organization at 1,000 individuals. According to government estimates, approximately 7 percent of the population is Christian, of which an estimated 40 percent is Russian Orthodox. Jews, Buddhists, Baha’is, and unaffiliated groups together constitute approximately 3 percent of the population. Adherents of Tengrism, an indigenous religion, estimate there are 50,000 followers in the country.

According to the National Statistics Committee, in 2019 (most recent data available) ethnic Kyrgyz make up approximately 73 percent of the population, ethnic Uzbeks approximately 15 percent, and ethnic Russians approximately 6 percent. Both ethnic Kyrgyz and ethnic Uzbeks are primarily Muslim. Ethnic Russians are primarily adherents of the Russian Orthodox Church or one of several Protestant denominations. Members of the Russian Orthodox Church and other non-Muslim religious groups live mainly in major cities.