Walter Scott Smith, Jr. (born 1940) is a United States federal judge.
Born in Marlin, Texas, Smith received a B.A. from Baylor University in 1964. He received a J.D. from Baylor University School of Law in 1966. He was in private practice in Waco, Texas from 1966 to 1980. He was a judge on the State District Court, Waco, Texas from 1980 to 1983.
Smith was a United States Magistrate Judge for the U.S. District Court for the Western District of Texas, 1983–1984.
Smith was a federal judge on the United States District Court for the Western District of Texas. Smith was nominated by President Ronald Reagan on September 11, 1984, to a new seat created by 98 Stat. 333. He was confirmed by the United States Senate on October 3, 1984, and received his commission on October 4, 1984. He served as chief judge from 2003–2010.