Harald Nugiseks (22 October 1921 – 2 January 2014) was an Estonian serviceman in the Waffen-SS of Nazi Germany during World War II. A Waffen-Oberscharführer (sergeant), he served in the 20th Waffen Grenadier Division of the SS (1st Estonian). Nugiseks was one of the four Estonians to receive the Knight's Cross of the Iron Cross.