Did US Grant own slaves?
No. He was way too poor prior to the beginning of the Civil War
and didn't believe in it. (Incorrect; see below)
The above answer is absolutely incorrect. It is true that he was
too poor to own slaves (due to his own business failures) but he
did inherit a slave by the name of William Jones from his
father-in-law in 1858. He would manumit Jones one year later. His
wife, Julia, did own four slaves herself. She was from a slave
holding family.
Grant also ran a slave operated farm in White Haven, Missouri,
delegating duties and chores such as chopping firewood and caring
after the livestock. Grant often worked alongside the farm's
slaves, as was a common practice of "hired help".
There are reference links below.