Elena-Luminița Cosma (née Radu, also Radu-Cosma; born 22 January 1972) is a Romanian chess player who holds the title of Woman Grandmaster (WGM, 1994).

In 1995 in Chișinău Cosma participated in the Women's World Chess Championship cycle Interzonal Tournament.

[1] In Romanian Women's Chess championships Cosma won four gold (1991, 1992, 2010, 2016), three silver (1991, 1994, 2012) and two bronze (2000, 2014) medals.

[2] Three times won the International Women's chess tournament in Bucharest: 1991 (together with Anda Šafranska), 1993, and 1994 (together with Tatiana Shumiakina).

In 2006 in Marseille Elena-Luminița Cosma divided first place with Anna Zatonskih and Cristina Adela Foișor in the International Women's chess tournament.