Answer
Yes, Aaron Schock is indeed the first U.S. Congress member born in the 1980s. He was born on May 28, 1981, in Peoria, Illinois. He served as the U.S. Representative for Illinois's 18th congressional district from 2009 to 2015. Prior to his election to Congress, Schock served in the Illinois House of Representatives from 2005 to 2009.