Mariana Olehivna Kozlova (; born 4 August 1983) is a Ukrainian former competitive ice dancer. With Sergei Baranov, she is the 2003 Winter Universiade silver medalist, the 2003 Skate Israel bronze medalist, and a two-time Ukrainian national medalist. They won five medals on the ISU Junior Grand Prix series (four silver, one bronze) and qualified to compete at two ISU Junior Grand Prix Finals. They finished in the top ten at two World Junior Championships, achieving their best result, 7th, in 2003.