Ervin Emil Dupper (January 8, 1923 – May 28, 2017) was an American politician. He was a member of the South Dakota State Senate from 1965 to 1968. He represented the 21st and 23rd districts. He served a brief stint as State Attorney of Walworth County in 1955 to 1956 prior to his election to the state senate. He was a member of the Republican Party.