John Fairfield (January 30, 1797 – December 24, 1847) was an attorney and politician from Maine. He served as a U.S. Congressman, governor and U.S. Senator. was born in Pepperellborough, Massachusetts (now Saco, Maine) and attended the schools of York County. After serving in the War of 1812, he pursued a business career before deciding to become an attorney, and after in the office of an established lawyer and judge, Fairfield attained admission to the bar in 1826. He practiced in Saco and Biddeford, and became active in politics as a Democrat.