The 18th century in the United States refers to the period in the United States from 1701 through 1800 in the Gregorian calendar. For articles on this period, see:

• History of the United States series:
  • Colonial history of the United States
  • History of the United States (1776–1789)
  • History of the United States (1789–1849)
• Historical eras:
  • American Revolution
  • Confederation period
  • Federalist Era