Terry Smith farms outside of Clayton with his wife Tammy. They grow corn and soybeans as well as raise cattle. He owns a certified tree farm as well as T & T Hardwoods. He graduated from Camp Point Central High School.
Smith has served on the board of Trinity Evangelical Lutheran Church, Great River Honor Flight board, Adams County Farm Bureau board, Adams County Quail Unlimited board, Illinois Forestry Development Council, Producers Alliance and National Corn Growers Association Action Teams. He has also taught Agri-computer Programs at John Wood Community College in Quincy.
He has served on the Illinois Corn Growers Association Board since 2016.