| Years in Canada: | 1800 1801 1802 1803 1804 1805 1806 |
| Centuries: | 18th century · 19th century · 20th century |
| Decades: | 1770s 1780s 1790s 1800s 1810s 1820s 1830s |
| Years: | 1800 1801 1802 1803 1804 1805 1806 |
Events from the year 1803 in Canada.
Incumbents
- Monarch: George III
Federal government
Governors
- Governor of the Canadas: Robert Milnes
- Governor of New Brunswick: Thomas Carleton
- Governor of Nova Scotia: John Wentworth
- Commodore-Governor of Newfoundland: Charles Morice Pole
- Governor of St. John's Island: Edmund Fanning
Events
- Thomas Jefferson completes Louisiana Purchase extending U.S. control west of the Mississippi River; federal plans to resettle Eastern tribes beyond the Mississippi soon begin.
- John Colter becomes the fourth man selected by William Clark to join the Lewis and Clark Expedition.
- The XY Company is reorganized under Alexander Mackenzie's name.
- First Canadian Paper Mill is built in Quebec.[1]
Births
- October 13 – Augustin-Norbert Morin, lawyer, judge, politician and Joint Premier of the Province of Canada (d.1865)
- March 24 – Egerton Ryerson, politician, teacher, principal, Methodist minister (d.1882)
- December 6 – Susanna Moodie, writer (d.1885)
Full date unknown
- John Kinder Labatt, brewer and founder of the Labatt Brewing Company (d.1866)
Deaths
- Nathaniel Pettit (1724 – March 9, 1803) a political figure in Upper Canada.
- Rev. Johann Samuel Schwerdtfeger (1734–1803) The first Lutheran minister in Ontario.[2]