The prime minister of Armenia () is the head of government and most senior minister within the Armenian government, and is required by the constitution to "determine the main directions of policy of the Government, manage the activities of the Government and coordinate the work of the members of the Government." Also, according to the constitution, the prime minister heads the Security Council, which prescribes the main directions of the country's defense policy; thus, the prime minister is effectively the commander-in-chief of the Armed Forces of Armenia. Nikol Pashinyan is the current prime minister. He took the office on 8 May 2018 following the resignation of Serzh Sargsyan.
The office of prime minister was first established in 1918 with the foundation of the First Republic of Armenia. The prime minister chosen by the National Council of Armenia and was accountable for international, domestic and regional issues. The first Prime Minister became Hovhannes Katchaznouni whose cabinet was made up from five members, all of which were from ARF. In addition, a ministry of interior was created, whose first head was Aram Manukian. It vanished when the First Republic of Armenia was incorporated into the Transcaucasian Socialist Federative Soviet Republic and then transferred into a full Soviet republic.
The governmental structure of the Armenian Soviet Socialist Republic was similar to that of the other Soviet republics. The highest executive and administrative organ of state power was the Council of Ministers. The Council consisted of the following positions:
When Armenia regained its independence in 1991, the office of prime minister was reintroduced. Under the new 2015 constitution, the prime minister is the most powerful and influential person in Armenian politics. The prime minister is appointed by the president of Armenia upon the vote of the National Assembly. The prime minister can be removed by a vote of no confidence in Parliament. In the constitutional referendum held in 2015, citizens voted in favor of transferring Armenia into a parliamentary republic.
The Prime Minister's Staff has the task of ensuring the enforcement of the powers vested in the Prime Minister and the Deputy Prime Ministers, as well as making preparations for Cabinet meetings:
This is a graphical lifespan timeline of the heads of government of Armenia. They are listed in order of first assuming office.
The following chart lists heads of government by lifespan (living heads of government on the green line), with the years outside of their tenure in beige.
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The following chart shows heads of government by their age (living heads of government in green), with the years of their tenure in blue. The vertical black line at 25 years indicates the minimum age to be prime minister.
ñ. Assassinated while in office in the 1999 Armenian parliament shooting.
ò. Died of heart attack while in office.