The Missouri state motto is "Salus Populi Suprema Lex Esto." The motto translates to "Let the welfare of the people be the supreme law."
The Latin phrase was adopted by the state in 1822. Missouri was officially adopted into the Union on August 10th, 1821. The unofficial nickname for Missouri is "The Show Me State." The nickname originated in 1899 when Congressmen Willard Vandiver gave a speech to the residents. Other nicknames for Missouri include "Mother of the West," "The Lead State" and "The Ozark State." The state is named for the Missouri River which flows through a large portion of the state.