John Blair sat on the(1745–1770), becoming its president in 1757 and serving as acting governor on four occasions. Born in Scotland, he came to as a child, living in Williamsburg and earning a degree there at the College of William and Mary, founded by his uncle, . John Blair served as deputy auditor general from 1728 until 1771, reforming and improving the procedures by which the government collected revenue. In addition, he served as York County justice of the peace (1724–1745) and as a naval officer on the James River (1727–1728). Upon the death of his father, Archibald Blair, he joined the representing (1724–1736). In 1736, he was elected as a burgess from Williamsburg, serving until 1740. He is probably the same John Blair who also served as mayor of Williamsburg in 1751. After the governor’s death and in ill health himself, Blair resigned from the Council in 1770 rather than serve as acting governor a fifth time. He died in 1771.