Fort Nelson may refer to:
Canada Fort Nelson, British Columbia, a town Fort Nelson River, British Columbia Fort Nelson (Manitoba) (1670–1713), an early fur trading post at the mouth of the Nelson River and the first headquarters of the Hudson's Bay Company
United Kingdom Fort Nelson, Hampshire, England (built 1860–1867), a Palmerston Fort and present-day museum
United States Fort Nelson (Kentucky), built in 1781 Fort Nelson (Virginia), first constructed in 1776
See also Camp Nelson (disambiguation)