Avetis Aharonian (4 January 1866 – 20 March 1948) was an Armenian politician, writer, public figure and revolutionary, also part of the Armenian national movement.

Aharonian was born in 1866 in Surmali, Erivan Governorate, Russian Empire (today Igdir, Turkey). Growing up, he was influenced by the natural features of his birthplace, such as the Aras River and Mount Ararat, both of which were located near Surmali.

His mother, Zardar, was a literate person, who was able to educate her child by teaching him how to read and write. After completing elementary education at the village's school, he was sent to Echmiadzin's Gevorkian Seminary, and graduated from there. He became a teacher for a few years, after which he went to Switzerland's University of Lausanne to study history and philosophy. During this period of time, he met Kristapor Mikaelian, who was then the chief editor of the Troshag (Flag) newspaper. He then began to write for the paper. In 1901, upon graduation, he went to study literature at the Sorbonne.

In 1902, he returned to the Caucasus and became the headmaster of the Nersisian School in Tiflis and the chief editor of the Mourj (Hammer) newspaper. Thus, in 1909, he was captured by the Tsar's government and imprisoned in Metekhi's prison, where he fell ill. Two years later, after a generous donation of 20,000 rubles, he fled to Europe.

He returned to the Caucasus in 1917, and chaired the Armenian National Council, which proclaimed the independence of the First Republic of Armenia on 28 May 1918. He signed the Treaty of Batum with the Ottoman Empire.

In 1919, he was the head the Armenian delegation at the Paris Peace Conference with Boghos Nubar, where he signed the Treaty of Sèvres formulating the "Wilsonian Armenia" in direct collaboration with the Armenian Diaspora.

Since 1920 Aharonian lived in emigration, in Paris. In 1926 he was nominated to the Nobel Prize for Literature by Antoine Meillet. He suffered a stroke in 1934 and lived for the last fourteen years of his life totally incapacitated. Aharonian died in Marseille in 1948.

His son Vardges Aharonian was a writer and activist.