John Pease Sanderson (November 28, 1816 – June 28, 1871) was a delegate of the Florida Secession Convention in Tallahassee, and then a Florida member of the Congress of the Confederate States during the American Civil War.
He became a member of the Florida State House of Representatives in 1843, was the solicitor of the Eastern Circuit of Florida from 1848–52, and became a Florida State Senate in 1848. He was a delegate to both the Florida Secession Convention of 1861 and then to the Confederate Provisional Congress from February 5–17, 1862, replacing George Taliaferro Ward.
John was married twice. He first married Mary E. Harrison (daughter of Robert Harrison of Amelia Island, Florida) on February 23, 1843. They had no children. Following her death on April 27, 1857, he later married her sister Marion R. Harrison on July 28, 1858. They had 2 children.