Tariff of 1791 or Excise Whiskey Tax of 1791 was a United States statute establishing a taxation policy to further reduce Colonial America public debt as assumed by the residuals of American Revolution. The Act of Congress imposed duties or tariffs on domestic and imported distilled spirits generating government revenue while fortifying the Federalist Era.

The Federalist Era in American history ran from 1788 to 1800, a time when the Federalist Party and its predecessors were dominant in American politics. During this period, Federalists generally controlled Congress and enjoyed the support of President George Washington and President John Adams. The era saw the creation of a new, stronger federal government under the United States Constitution, a deepening of support for nationalism, and diminished fears of tyranny by a central government. The era began with the ratification of the United States Constitution and ended with the Democratic-Republican Party's victory in the 1800 elections.