Elena Angélica Dolores Holmberg Lanusse (24 May 1931 – disappeared 20 December 1978), better known as Elena Holmberg, was an Argentine diplomat who was kidnapped and assassinated in 1978. Distinguished for being the first woman to graduate from the Institute of Foreign Services of the Nation, Holmberg was an important official of the military dictatorship which took power in 1976, and is generally believed to have been detained-disappeared and then killed by the regime to which she belonged.