Jack Alan Markell (born November 26, 1960) is an American former businessman and politician who served as the 73rd Governor of Delaware from 2009 to 2017. He is a member of the Democratic Party.
Markell served three terms as the State Treasurer of Delaware from 1999 to 2009. After term-limited Governor Ruth Ann Minner was prevented from running for reelection, Markell announced his intention to run for the Democratic nomination for governor. Markell defeated Lieutenant Governor of Delaware John Carney with 51% of the vote in the Democratic primary, and defeated the Republican nominee, former Delaware Superior Court Judge William Swain Lee, with 67% of the vote in the general election; becoming Delaware’s first Jewish governor. Markell won reelection by a margin of over 40%, the largest margin in any race for governor in Delaware’s history.