Abel Parker Upshur (1790–1844) was an American lawyer, judge, and politician from Virginia.
He was active in Virginia state politics and later served as secretary of the Navy and secretary of state during the Whig administration of President John Tyler.
He was the pseudonymous author of An Exposition of the Virginia Resolutions of 1798, a vigorous defense of state nullification.
Ludwig von Mises: "We must comprehend that it is impossible to improve the economic conditions of the underdeveloped nations by grants in aid. If we send them foodstuffs to fight famines, we merely relieve their governments from the necessity of abandoning their disastrous agricultural policies." - Money, Method, and the Market Process