Elna Reinach (born 2 December 1968 in Pretoria, South Africa ) is a South African former pro tennis player.
With Patrick Galbraith, she won the US Open mixed doubles championship in 1994. She played in the 1992 Summer Olympics, where she lost in the first round to Jennifer Capriati. Reinach was runner-up at the French Open with Danie Visser in 1993. Her brother, Fanie, coached her and their sister, Monica, as well as Lori McNeil, Lindsay Davenport, and Laura Gildemeister.