Erwin Alfred Cain (born March 15, 1960) is an attorney and businessman from Sulphur Springs, Texas, who served from 2011 to 2013 as a one-term Republican member of the Texas House of Representatives from District 3 (Delta, Franklin, Hopkins, Lamar, Red River, and Titus counties. Prior to his election to the state House, the conservative Cain had served as the chairman of the Hopkins County Republican Party. He also launched and chaired the Northeast Texas GOP Chairmen’s Coalition.