John Pendleton King (April 3, 1799 - March 19, 1888) was a United States Senator from Georgia.
Born in Glasgow, Kentucky, King moved in infancy with his parents to Bedford County, Tennessee, and then to Augusta, Georgia, in 1815. He graduated from Richmond Academy in Augusta, and studied law. He was admitted to the bar in 1819 and practiced in Augusta.
King pursued studies in Europe from 1822 to 1824. He returned and continued the practice of law in Augusta until 1829. He was a member of the State constitutional conventions in 1830 and 1833. He was appointed judge of the court of common pleas in 1831. He was elected in 1833 as a Jacksonian (later Democrat) to the United States Senate to fill the vacancy caused by the resignation of George M. Troup. He was reelected in 1834 and served from November 21, 1833, until November 1, 1837, when he resigned.
After his time in politics, King became president of the Georgia Railroad and Banking Company from 1841 to 1878. He was then a railroad promoter and cotton manufacturer, and was a member of the State constitutional convention in 1865. King died in Summerville, Georgia and was intered in St. Paul's Churchyard, Augusta.