Colonel Stevens Thomson Mason (December 29, 1760 – May 10, 1803) was an American lawyer, military officer and planter who served in the Continental Army during the Revolutionary War.
[1] His ancestors had emigrated generations earlier and owned thousands of acres of land (some developed and farmed by enslaved labor) in Maryland and Virginia.
His grandmother invested in real estate being developed along the Potomac River in Loudoun County, which by the time of her death may have exceeded the lands his uncle inherited by primogeniture.
[3] Especially after his father's 1785 death at the family's Raspberry Plain plantation in what had become Loudoun County, Mason operated farms using enslaved labor, as would his descendants.
Following the war, Loudoun County voters elected him as one of their (part-time) representatives in the Virginia State House of Delegates in 1783, and he served alongside veteran John Carter, although neither won re-election the following year.
[5] In 1787 he won election to the Virginia State Senate representing Loudoun and nearby Fauquier Counties (thus serving in 4 General Assembly sessions), but failed to win re-election in 1791, being replaced by veteran politician Francis Peyton.