Roger D. Thomas (born December 13, 1950) is the Iowa State Representative from the 55th District.

His prior political experience includes service as a trustee for Northeast Iowa Community College.

Thomas was first elected in 1996, defeating incumbent Republican Roger Halvorson.

He lost the election to Republican Mark Zieman, the former senator's son.

On March 13, 2014 Thomas announced he would not seek reelection to the Iowa House.