The claim is true because multiple historical institutions document that George Washington enslaved people for much of his life, although the number and legal ownership status varied over time.
George Washington owned slaves.

Status of Enslaved People in Washington's Will - George Washington's Mount Vernon
Source: mountvernon.org
Key Evidence
George Washington's Mount Vernon and Encyclopedia Virginia both identify Washington as a long-term slaveholder.
The White House Historical Association records that his will freed 123 people he owned outright after Martha Washington's death, while PBS describes the larger group of enslaved people controlled jointly by George and Martha Washington.
These sources support the central claim, while also showing why simple counts of the people he enslaved can differ.
What the Evidence Shows
George Washington owned enslaved people from his youth until his death in 1799. Encyclopedia Virginia states that he owned enslaved people from age eleven onward, while George Washington's Mount Vernon describes him as a slaveholder for 56 years.
The scale of Washington's slaveholding changed over time and included people he owned outright as well as people enslaved by the Custis estate and controlled through his marriage to Martha Washington. The White House Historical Association explains that Washington's will freed 123 people whom he owned outright, but it could not free dower enslaved people belonging to the Custis heirs. PBS reports that George and Martha Washington together controlled approximately 200 enslaved people at the beginning of the American Revolution and 317 near the end of his life.
Washington's 1799 will provided for the emancipation of the enslaved people he owned after Martha Washington's death, subject to specified conditions. This later action does not change the fact that he participated in and benefited from slavery during his lifetime. The evidence also shows that his views evolved and that he expressed opposition to the institution later in life, but he did not emancipate his enslaved workers while he was alive.
The Reddit and Quora results provide commentary rather than strong historical evidence. Wikipedia is useful as a secondary overview but is less authoritative than the institutional and educational sources. The April 2026 Mother Jones article is recent commentary that is broadly consistent with the historical record, though its specific numerical claims should be checked against primary records and specialist historical sources.