Sheena Tosta (née Johnson; born October 1, 1982) is an American track and field athlete who competes in the 400 metres hurdles.

She won a silver medal in the Women's 400 metre hurdles at the 2008 Olympic Games.

She finished fourth at the 2004 Summer Olympics and eighth at the 2006 World Athletics Final.

Born in Camden, New Jersey, she graduated from Gar-Field Senior High School in Woodbridge, VA in 2000.

This article about a track and field Olympic medalist of the United States is a stub.