Kaina Darina Martinez is a Belizean athlete. She competed in 100 metres at the 2012 Summer Olympics in London. In 2017, she was named one of nine finalist for the NCAA Woman of the Year Award. Martinez was born in the Garifuna village of Seine Bight, Stann Creek District.

The women's 100 metres competition at the 2012 Summer Olympics in London, United Kingdom was held at the Olympic Stadium on 3–4 August.