immigrant minorities, with the former often using Serbia as a transient country on their way to Western Europe. Religion Serbia is largely a homogeneous Eastern Orthodox nation, with Catholic and Muslim minorities, among other smaller confessions. Orthodox Christians number 6,079,396 or 84.5% of country's population. The Serbian Orthodox Church is the largest and traditional church of the country, adherents of which are overwhelmingly Serbs. Other Orthodox Christian communities in Serbia include Montenegrins, Macedonians Romanians and Bulgarians. There are 356,957 Roman Catholics in Serbia, roughly 5% of the population, mostly in Vojvodina (especially its northern part) which is home to minority ethnic groups such as Hungarians, Croats, Bunjevci, Albanians, as well as to some Slovaks and Czechs. Protestantism accounts for about 1% of the country's population, chiefly among Slovaks in Vojvodina as well as among Reformist Hungarians. Muslims, with 222,282 or 3% of population, form third largest religious group. Islam has a strong historic following in the southern regions of Serbia, primarily in southern Raška. Bosniaks are the largest Islamic community in Serbia; estimates are that some third of country's Roma people are Muslim. Languages The official language is Serbian, member of the South Slavic group of languages, and is native to 6,330,919 or 88% of the population. Recognized minority languages are: Hungarian (mother tongue to 243,146 people or 3.4% of population), Slovak, Romanian, Bulgarian, and Rusyn as well as Bosnian and Croatian which are completely mutually intelligible with Serbian and in recent history were considered part of the single Serbo-Croatian pluricentric language. All these languages are in official use in municipalities or cities where more than a 15% of population consists of national minority. In Vojvodina, provincial administration uses, besides Serbian, five other languages (Hungarian, Slovak, Romanian, Croatian, and Rusyn). Largest cities Migration Emigration Immigration Foreign citizens in Serbia in 2016. After the start of the Russian invasion of Ukraine, more than 100,000 Russian citizens and 18,000 Ukrainian citizens arrived in Serbia within 7 months. Other demographic data Data that follows has been derived from the Ministry of Demography and Population Policy of Serbia Official website Median age of the population Total: 43.16 years (2018) Male: 41.73 years Female: 44.53 years Mother's mean age at first birth 28.4 years (2018) Number of marriages per 1000 inhabitants 5.2 marriages/1,000 population (2018) Median age of the groom at the time of marriage 34.2 years (2018) Median age of the bride at the