Mo. Rev. Stat. § 71.040: Duty of the secretary of state.

The secretary of state shall, as soon as practicable after the passage of this law, communicate with the county clerks in each county in this state, and ascertain the names of all cities, towns, villages or other municipal corporations therein, and arrange such names in alphabetical order for convenient reference. Such lists of names shall be kept filed in his office, and shall be changed whenever a change of name shall be effected under the provisions of this chapter.