Heranush (Nargiz) Arshagian (Armenian: Հերանուշ (Նարգիզ) Արշակեան) (July 28, 1887 in Constantinople, Ottoman Turkey – 1905 in Constantinople, Ottoman Empire) was an Ottoman Armenian poet.^[1]

Heranush Arshagian was born in the Beşiktaş district of Constantinople in 1887. Her father Hagop, who died when she was 3, was a prominent social activist in the Armenian community.^[1] When Arshagian turned 10 years old, she entered the Bakırköy French girls school.^[1] After studying there for a year and a half, Arshagian continued her studies at the Makruhian Armenian School in the Beşiktaş district.^[1][2] Arshagian's teachers were highly impressed by her essays and writings, but her days as a student were interrupted when her doctors suggested that she lived outside of the city. Arshagian moved to a farm on the outskirts of Yedikule, where she derived inspiration from the natural setting.^[1] It was during those years that Arshagian began to write poetry. She writes in her memoirs, "The fields are green. Afar I can see Constantinople with her ever-flowing suburbs. Beyond that are the hills and mountains covered in fog and the Marmara sea so very beautiful, so very trembling under the fiery rays of the sun..."^[1][2]

Arshagian died in 1905 at the age of 18.

She wrote a series of lyrical poems, novels, and short stories which were published after the author's death in Hayganush Mark's Tsaghig (Flower) newspaper.^[1] In 1910 Hrand Nazariantz, who was in constant contact with Heranush Arshagian, published a book about her life and works in Constantinople.^[3]