The following elections were held in the year 1804.
North America
United States
- 1804 New York gubernatorial election
- United States House of Representatives elections in New York, 1804
- 1804 and 1805 United States House of Representatives elections
- 1804 United States presidential election
- 1804 and 1805 United States Senate elections
- United States Senate special election in New York, November 1804
- United States Senate special elections in New York, February 1804