In 1846, a Whig–Liberty Party–Independent Democrat coalition assumed power in New Hampshire state government. Whig Anthony Colby was elected Governor, Independent Democrat John P. Hale was elected Speaker of the State House of Representatives, and Cilley was elected to the United States Senate to fill the vacancy caused by the resignation of Levi Woodbury.[1] Cilley served from June 13, 1846, to March 3, 1847. He was an unsuccessful candidate for reelection in 1846, after which he retired to his farm in Nottingham. He was interred in the general Joseph Cilley Burying Ground in Nottingham Square.
At the time of his death, he was the oldest living ex-U.S. Senator.[2]
Scales, John. Life of General Joseph Cilley. New Hampshire: Standard Book Co., 1921.
Memoirs and Services of Three Generations: General Joseph Cilley, First New hampshire Line. War of the Revolution; Johnathan Longfellow, Father of sarah, wife of General Joseph Cilley; Colonel Joseph Cilley, U.S. Senator and Officer in the War of 1812; Honorable Johnathan Cilley, Member of Congress from Maine; Commander Greenleaf Cilley, War with Mexico and War of 1861; General Johnathan P. Cilley, First Main Cavalry, War of the Rebellion - reprint from the Courier-Gazette, Rockland Maine, 1909