The 1900 Missouri Secretary of State election was held on 6 November 1900 in order to elect the secretary of state of Missouri. Democratic nominee Sam Baker Cook defeated Republican nominee Walter L. Porterfield, Social Democratic nominee William H. Strife, Prohibition nominee Elbridge H. Benham, People's Progressive nominee Bernard Finn and Socialist Labor nominee Edward Heitzig.
General election.
On election day, 6 November 1900, Democratic nominee Sam Baker Cook won the election by a margin of 38,875 votes against his foremost opponent Republican nominee Walter L. Porterfield, thereby retaining Democratic control over the office of secretary of state. Cook was sworn in as the 20th secretary of state of Missouri on 14 January 1901.
Results.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
References.
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