Bibb's first office was as a member of the Georgia House of Representatives. Elected in 1802, at the age of 21, he took office in 1803 and served one term until 1805. He was elected as a Democratic-Republican to the Ninth United States Congress to fill a vacancy caused by the resignation of Thomas Spalding, and was reelected four times, serving until November 6, 1813. He was then elected by the state legislature, to the United States Senate to fill a vacancy created by the resignation of the nationally known and presidential candidate William H. Crawford and served until November 9, 1816.
Governor of Alabama
Fifth President James Monroe, appointed Bibb as the first governor of the newly formed Alabama Territory in 1817. Alabama became the 22nd state on December 14, 1819. Bibb was elected governor, defeating Marmaduke Williams. Bibb received 8,342 votes, while Williams received 7,140 votes. Bibb's primary duties were establishing the state government. Huntsville was designated to be the site of the constitutional convention. The capital was chosen to be the newly created town of Cahawba in 1820 on the Alabama frontier, it then moved to Tuscaloosa in 1826, and finally to the central city ofMontgomery in 1846, where a State Capitol building was later begun. During Bibb's tenure, the Alabama state militia and the beginnings of the state judicial system with the organization and appointments to the Supreme Court of Alabama were accomplished. Henry Hitchcock was elected the first Attorney General of Alabama and initially held the position of Secretary of State of Alabama as well. However, shortly afterward Thomas A. Rodgers was elected as the second Secretary of State of Alabama. The first session of the state legislature was held from October 25, 1819, to December 17, 1819. William R. King and John W. Walker were chosen as the first U.S. Senators. Bibb remains one of only three individuals who served as governor of a state and a U.S. senator from a different state. The others are Sam Houston, who served as the sixth governor of Tennessee and a U.S. senator from Texas, and Mitt Romney, who served as the seventieth governor of Massachusetts and is currently a U.S. senator from Utah.
Death
In 1820, Bibb was thrown from his horse during a violent thunderstorm. He died from internal injuries on July 10, 1820 at the age of 38. His brother, Thomas Bibb, was president of the state senate at the time and completed the rest of his term. Bibb is buried in Coosada, Alabama. As first governor his likeness appears on the Alabama Centennial half dollar, which was minted in 1921.