Corina-Isabela Peptan (born March 17, 1978) is a Romanian chess player with the titles of International Master (IM) and Woman Grandmaster (WGM). She won the World Youth Chess Championships in several girls categories: Under 10 in Timişoara 1988, Under 12 in Fond du Lac 1990, Under 14 in Warsaw 1991, and Under 18 in Guarapuava 1995.
Peptan competed in the Women's World Chess Championship in 2000, 2001 and 2004. She reached the quartefinals in 2000. Peptan won the Romanian women's championship in 1994, 1995, 1997, 2000, 2004, 2007, 2008, 2009, 2014, 2015 and 2017.
In team events, she has represented Romania in the Women's Chess Olympiad, Women's European Team Chess Championship, Women's Chess Balkaniads and Girls' Chess Balkaniads. Peptan has won two individual silver medals at the olympiad, in Moscow 1994 (playing board 3) and Calvià 2004 (board 2). In the European Club Cup for Women, she played for gold medal-winning team AEM-Luxten Timişoara in 1998.