Margaret A. answered 03/27/19
Tutor with History degree and a minor in Secondary Education
That would depend if you are talking about July 4,1776 when we declared our independence or when the Treaty of Yorktown was singed ending the Revolutionary War on September 3,1783. If you go by the early date then William Henry Harrison would have been a non-natural born citizen born on February 9th 1773. However if you are going by the Treaty of Yorktown's date then the answer would be Martin Van Buren born on December 5, 1782.
Hope this answers your question. Any other questions please feel free in get in touch with me.
Margaret