The Louisiana State Treasurer special election took place on October 14, 2017, to elect the state treasurer of Louisiana, with a runoff election to be held on November 18, 2017, if necessary. Republican State Treasurer John Kennedy resigned after he was elected to the U.S. Senate in 2016. First Assistant Treasurer Ron Henson replaced Kennedy as treasurer, and served until the special election. Henson did not run in the special election.
Under Louisiana's jungle primary system, all candidates appeared on the same ballot, regardless of party and voters may vote for any candidate, regardless of their party affiliation. If no candidate receives a majority of the vote during the primary election, a runoff election will be held between the top two candidates. Louisiana is the only state that has a jungle primary system (California and Washington have a similar "top two primary" system). In the first round, Republican candidates received over 65% votes. Republican John Schroder defeated Democrat Derrick Edwards 55.7%-44.3% in the runoff.