Ernest Robert Moore (November 1, 1869 – March 4, 1957) was an American politician and banker.
Born in Anamosa, Iowa, he moved with his family to Cedar Rapids, Iowa. He served in the Spanish–American War. He was a banker in Cedar Rapids. Moore served in the Iowa House of Representatives from 1909 to 1913 and as Lieutenant Governor of Iowa under Governor William L. Harding between 1917 and 1921.