He died at his home in Quincy, MA i think. on July 4, 1826 he died a few hours after Thomas Edison. that was exactly 50 years after the Declaration of Independence was approved.
He didn't.
John Adams Harper died in 1816.
John J. Adams died in 1919.
John Jay Adams died in 1926.
John Adams Gilmer died in 1868.
John Clayton Adams died in 1906.
John Adams Whipple died in 1891.
John Worthington Adams died in 1837.
John Adams Webster died in 1877.
John T. Adams died in 1939.
John Adams - cartographer - died in 1738.
John G. Adams died in 2003.