- John Quincy Adams (July 11, 1767 – February 23, 1848) was an American statesman who served as the sixth president of the United States from 1825 to 1829. He also served as a diplomat, a senator and member of the House of Representatives. He was a member of the Federalist, Democratic-Republican, National Republican, and later Anti-Masonic and Whig parties. John Quincy Adams was the son of former President John Adams and Abigail Adams.