Armenians (Armenian: հայեր, hayer [hɑˈjɛɾ]) are an ethnic group native to the Armenian Highland.
The Republic of Armenia and the unrecognized de facto independent Nagorno-Karabakh Republic are the two countries where Armenians form a majority, both with a nearly homogeneous population. Because of a wide-ranging and long-lasting diaspora, an estimated total of 5-7 million people of full or partial Armenian ancestry live outside of Armenia. As a result of the Armenian Genocide, a large number of survivors fled to many countries throughout the world. The largest Armenian populations today exist in Russia, the United States, France, Georgia, Iran, Lebanon, and Syria.
Most Armenians adhere to the Armenian Apostolic Church, a non-Chalcedonian church, which is also the world's oldest national church. Christianity began to spread in Armenia soon after Jesus's death, due to the efforts of two of his apostles, St. Thaddeus and St. Bartholomew. In the early 4th century, the Kingdom of Armenia became the first nation to adopt Christianity as a state religion.
The demographics of Armenia is about the demographic features of the population of Armenia, including population growth, population density, ethnicity, education level, health, economic status, religious affiliations, and other aspects of the population.