The following elections were held in the year 1805.
North America
- 1805 elections in the United States by state
- 1805 United States House of Representatives elections
- 1805 United States Senate elections
- 1805 Pennsylvania gubernatorial election
- 1805 Tennessee gubernatorial election
- 1805 United States House of Representatives elections in Tennessee
- 1805 United States House of Representatives elections in Virginia
- 1805 North Carolina's 5th congressional district special election
- 1805 Pennsylvania's 4th congressional district special election
- 1805 Pennsylvania's 11th congressional district special election
- 1805 Delaware's at-large congressional district special election
- 1804–1805 United States House of Representatives elections in Vermont
The following elections were held in the year 1805.
North America
- 1805 elections in the United States by state
- 1805 United States House of Representatives elections
- 1805 United States Senate elections
- 1805 Pennsylvania gubernatorial election
- 1805 Tennessee gubernatorial election
- 1805 United States House of Representatives elections in Tennessee
- 1805 United States House of Representatives elections in Virginia
- 1805 North Carolina's 5th congressional district special election
- 1805 Pennsylvania's 4th congressional district special election
- 1805 Pennsylvania's 11th congressional district special election
- 1805 Delaware's at-large congressional district special election
- 1804–1805 United States House of Representatives elections in Vermont