1805 (MDCCCV) was a common year starting on Tuesday of the Gregorian calendar, the 1805th year of the Common Era (CE) and Anno Domini (AD) designations, the 805th year of the 2nd millennium, the 5th year of the 19th century, and the 6th and last year of the 1800s decade.

Millennium: 2nd millennium
Centuries: 18th century19th century20th century
Decades: 1770s  1780s  1790s  – 1800s –  1810s  1820s  1830s
Years: 1802 1803 180418051806 1807 1808