He also raised his orphaned nephew, Augustine Jacquelin Smith, who was educated as a physician but did not practice that profession, instead becoming a planter after reaching legal age to inherit his father's 'Ravensworth' plantation, and serving several distinct terms in the Virginia House of Delegates representing Fairfax County.

His son Augustine Charles Smith (1789-1843) would also serve with distinction as a U.S. Army officer (in the War of 1812, promoted from the rank of major to colonel) and then presided over a school in Winchester as well as won election to the Virginia Senate (representing Frederick and Jefferson Counties 1827-1831).

His grandson, Col. Archibald Magill Smith would continue the family's martial tradition as a Confederate cavalry captain, although several of his cousins became doctors and moved to Missouri before the conflict.

[3] Frederick County voters first elected Smith as one of their two representatives in the House of Delegates beginning in 1777, where he served alongside Isaac Zane and was re-elected twice but was replaced by Joseph Holmes in 1780.

Smith again won election in 1786, serving alongside veteran Charles Mynn Thruston, but failed to win re-election, being replaced by John Shearman Woodcock.