Etti Plesch (3 February 1914 – 28 April 2003), was an Austro-Hungarian countess, huntress, racehorse owner and socialite.
Plesch lost two of her six husbands to the same woman, Louise de Vilmorin, a French literary figure, and owned two winners of The Derby, in Psidium in 1961 and Henbit in 1980.