Robert Douglas Bullock, Sr., known as Bob Bullock (July 10, 1929 – June 18, 1999), was a Democratic politician from Texas, whose career spanned four decades. His service culminated in his term as the 38th Lieutenant Governor of Texas from January 15, 1991 to January 19, 1999 during the term of Governor Ann W. Richards and the first term of Governor George W. Bush.