John Wentworth (March 5, 1815 – October 16, 1888), nicknamed Long John, was the editor of the Chicago Democrat, publisher of an extensive Wentworth family genealogy, a two-term mayor of Chicago, and a six-term member of the United States House of Representatives, both before and after his service as mayor. After growing up in New Hampshire, he joined the migration west and moved to the developing city of Chicago in 1836, where he made his adult life. Wentworth was affiliated with the Democratic Party until 1855; then he changed to the Republican Party. After retiring from politics, he wrote a three-volume genealogy of the Wentworth family in the United States. Early life and education John Wentworth was born in Sandwich, New Hampshire. He was educated at the New Hampton Literary Institute and at the academy of Dudley Leavitt. He graduated from Dartmouth College in 1836. Migration west and career Later that year, Wentworth joined a migration west and moved to Chicago, arriving in the city on October 25, 1836. He became managing editor of Chicago's first newspaper, the Chicago Democrat, eventually becoming its owner and publisher. Wentworth was admitted to the bar in 1841. He started a law practice and entered politics. He was a business partner of Illinois financier Jacob Bunn, and the two men were two of the incorporators of the Chicago Secure Depository Company. Marriage and family In 1844, he married Roxanna Marie Loomis. In later years, his nephew Moses J. Wentworth handled his business affairs, and would eventually manage his estate as well. Political career Wentworth started his political involvement as a Jacksonian democrat, and promoted these views in the Chicago Democrat. After he supported the 1837 mayoral candidacy of William Ogden, including throwing the newspaper behind Ogden's candidacy, he was appointed by Odgen to serve in the post of city printer. Wentworth, after having become active in Democratic politics, was elected to the U.S. House of Representatives, where he served for a total of six terms, five of them as a Democrat: (March 4, 1843March 3, 1851 and March 4, 1853March 3, 1855). He returned to Chicago and affiliated with the Republican Party. Wentworth was first elected mayor in the 1857 Chicago mayoral election; he served two terms, 1857–1858 and 1860–1861 (being elected to his second term in the 1860 Chicago mayoral election). In his second term, he again affiliated with the Democratic Party. As