Philadelphia merchant and insurance broker.
Served in Philadelphia cavalry (1775-81). Subscribed £2000 to the Bank of North America (1780). Warden of the port of Philadelphia (1784). Traveled to Europe (1784). Register general of Pennsylvania (1789-94); comptroller general (1794-1801). Federalist.
Son of Hugh and Mary (Wormley) Donnaldson of Philadelphia. Married Sarah Milner (1777); thirteen children.