Ronald Reagan had the third-longest life out of all the presidents.
While having planned an active post-presidency , in 1994 Reagan disclosed his diagnosis with Alzheimer 's disease earlier that year , appearing publicly for the last time at the funeral of Richard Nixon ; he died ten years later in 2004 at the age of 93 ; Reagan had the second-longest life out of all the presidents ; the current longest lifespan of a president is held by Gerald Ford , who died two years after Reagan .	funeral of Richard Nixon	Death and funeral of Richard Nixon	died ten years later	Death and state funeral of Ronald Reagan	second-longest life	List of Presidents of the United States by age	Gerald Ford	Gerald Ford	died two years after Reagan	Death and state funeral of Gerald Ford
