I checked with the person I know whose ancestor was supposedly the last Revolutionary War soldier to die--he died on Jan. 8, 1865, more than three years before this man in Ohio. After his death his family received a letter from Abraham Lincoln which referred to him as the last surviving veteran of the Revolutionary War. It looks like Lincoln was wrong about that.
The last survivor of the Americans who were at Lexington Green on April 19, 1775, died in 1864 at the age of 96.
Correction—that should have read 1854, not 1864. Jonathan Harrington, 16, was a fifer in the Lexington militia at the time of the battle of Lexington and died in 1854.