Final answer:
James Monroe was the last president who was a Founding Father, serving from 1817 to 1825, known for the Monroe Doctrine.
Step-by-step explanation:
The last president who was considered one of the Founding Fathers of the United States was James Monroe. He was the fifth president, serving from 1817 to 1825, and his presidency marked the last of the so-called Virginia Dynasty—a series of presidents from Virginia that included Thomas Jefferson and James Madison, also Founding Fathers. Monroe is known for the Monroe Doctrine, a policy that opposed European colonialism in the Americas.
The term Founding Fathers generally refers to figures like George Washington, Thomas Jefferson, John Adams, Benjamin Franklin, Alexander Hamilton, James Madison, and others who played significant roles in the American Revolution, the drafting of the United States Constitution, and the early governance of the newly-formed nation.