How many presidents did not have a wife?

Answer 1

There were six Presidents who were unwed when they entered office. The only President to never marry was James Buchanan. Grover Cleveland married for the first time while he was in office. Thomas Jefferson, Andrew Jackson, Martin Van Buren, and Chester Arthur did not have wives while in office because of previous death.

Answer 2

There were four U.S. presidents who did not have a wife during their time in office: James Buchanan, who never married; Grover Cleveland, who got married during his first term; and Thomas Jefferson and Chester A. Arthur, who were widowers when they became presidents.