Eftichia Papagianopoulos (Greek: Ευτυχία Παπαγιαννοπούλου), also spelled as Eftihia Papagianopoulou (1893 – 7 January 1972), was a Greek lyricist.

She was born in Aydın near İzmir in Ottoman Empire in 1893. She left İzmir in 1919 prior to the Greco-Turkish War. She emigrated to Greece and settled permanently in Athens.

She wrote the lyrics to many popular Greek songs, collaborating with composers like Vassilis Tsitsanis, Apostolos Kaldaras and Manos Hadjidakis; however, she didn't achieve major fame famous until her death in 1972. Her great contribution to Greek music through her exceptional ability in lyricism wasn't broadly known and recognized, although many of the successful songs of the 1950s and 1960s had been written by her.

A book written by lyricist and journalist Lefteris Papadopoulos, who was a friend of Eftichia during the last years of her life, helped to increase recognition for her work.