Marju is an Estonian feminine given name, a cognate of the English language given name Mary.
As of 1 January 2023, 1,483 women in Estonia bear the first name Marju, making it the 122nd most popular female name in the country. People bearing the name Marju include:
Marju Kõivupuu (born 1960), Estonian philologist, cultural historian, writer and folklorist
Marju Kuut (1946–2022), Estonian jazz singer
Marju Länik (born 1957), Estonian pop singer
Marju Lauristin (born 1940), Estonian politician
Marju Lepajõe (1962–2019), Estonian classical philologist, translator and religious historian