Like his father, uncle and others of his class, Robinson was a planter who produced tobacco for export to Europe using enslaved labor. Although no records survive as to the date Robinson established his residence in King and Queen County, he resided at Pleasant Hill plantation along the Mattaponi River from 1744 (when he bought that plantation from Richard Johnson, who had inherited it from his uncle, also Richard Johnson, who may have inherited it from his father, Richard Johnson of the colony's Council of State, who died in 1699) until his death in 1766. Robinson's wife, Lucy Moore, was from King William County across the Mattaponi River. Rumors that her father, Col. Augustine Moore, built the mansion for his daughter could not be substantiated. The middle Richard Johnson left 1000 acres on that side of the Mattaponi River to his nephew, which grew to 4000 acres by Robinson's death. Robinson family members resided at Pleasant Hill until the executors of his estate sold it (advertised in April 1770 as 1300 acres of high land and 600 of marsh) by November 1773. Robinson was first elected to public office in King and Queen County in 1727, but that election (as one of the Burgesses representing the area part-time during legislative session) was overturned following allegations of "illegal proceedings," although the House of Burgesses allowed Robinson to assume his seat as one of burgesses representing King and Queen County in 1730. Moreover in 1732, Robinson succeeded Chesley Corbin Thacker as clerk of the King and Queen county court. Continuing the tradition of both sides of his family, Robinson would then continually win re-election as one of the burgesses representing King and Queen County for nearly three decades, until his death. During this long tenure, Robinson demonstrated mastery of the rules of parliamentary procedure. When the previous treasurer, John Holloway, had resigned, the accounts were found in disorder, with £1,850 in arrears, possibly from amounts not forwarded by county sheriffs, though Holloway had also commingled state and personal funds. After Robinson died, burgesses discovered that he failed to burn redeemed notes, but instead used them to make personal loans exceeding £100,000 from the treasury to his friends. Auditors also discovered Robinson too failed to deposit funds received by local sheriffs into the Treasury. The
resulting scandal reverberated in Virginia politics for years. Despite the sale of Mount Pleasant, and the next plantation upstream on the Mattaponi River, "Clifton", and a tobacco warehouse, Robinson's estate was not settled until decades after the end of the
American Revolution. While John Robinson was Speaker of the House of Burgesses, relations with England deteriorated after the
French and Indian War, as British officials attempted to recoup costs incurred defending the colony. Following news of the
Stamp Act in 1765, some burgesses proposed the
Virginia Resolves against those fiscal measures. After
Patrick Henry's speech favoring the resolution, Robinson shouted, "Treason!, Treason!" ==Positions held in the Virginia Colony==