Tatiana Hernández (Santa Cruz de Tenerife, 1968) is a Spanish film costume designer.

She moved to Madrid to study film and sound at the Faculty of Information Sciences at the Complutense University of Madrid, while also studying film and television costume design and production design. She began working in costume design for theater, short films, and advertising. She debuted as a film costume designer in 1996 with the short film Esposados ​​by Juan Carlos Fresnadillo. She would work with this director again in 2001 on his first feature film, Intacto. In 2004, she received her first Goya nomination for Best Costume Design for her work on Mortadelo y Filemón. In 2011, she won the Goya Award for Best Costume Design for her work on Lope and was nominated for a Gaudí Award for Best Costume Design for the same film.