The City of Fort Lupton is a Statutory City located in southern Weld County, Colorado, United States. The town population was 7,955 at the 2020 United States Census. Fort Lupton is a part of the Greeley, CO Metropolitan Statistical Area and the Front Range Urban Corridor.

The city was named for Lieutenant Lancaster Lupton, who built a trading post on Adobe Creek in 1838. The trading post, Fort Lupton, has been reconstructed near the site of the original fort using some of the original adobe bricks at the South Platte Valley Historical Park, which was established by the South Platte Valley Historical Society northwest of the city of Fort Lupton. It is a historical park about early area settlement. 

– Updated 2022