John McClure (died 1915),[1] nicknamed Poker Jack,[2] was a politician and judge in Arkansas during Reconstruction.

A Republican "carpetbagger", he arrived in the capital city of Little Rock as the Lieutenant Colonel of an African-American regiment in the United States Army.

Dismissed from the Army for playing cards, he gained the nickname, "Poker Jack," from the Democrats.

When Clayton was impeached in 1870, McClure issued an injunction preventing Clayton's lieutenant governor James M. Johnson from taking office.

As a result of this action, McClure was also impeached and only narrowly avoided removal from office.