The City of Fort Lupton is a Statutory City located in Weld County, Colorado, United States. The population was 7,377 as of the 2010 census.
Fort Lupton is located at 40°5′N 104°48′W / 40.083°N 104.800°W / 40.083; -104.800 (40.0849, -104.8030).
According to the United States Census Bureau, the city has a total area of 4.0 square miles (10 km), of which, 4.0 square miles (10 km) are land and 0.04 square miles (0.10 km) (1.00%) are covered by water.
As of the census of 2000, there were 6,787 people, 2,099 households, and 1,677 families residing in the city. The population density was 1,707.2 people per square mile (658.4/km²). There were 2,132 housing units at an average density of 536.3 per square mile (206.8/km²). The racial makeup of the city was 70.34% White, 0.43% African American, 1.36% Native American, 0.83% Asian, 0.03% Pacific Islander, 22.65% from other races, and 4.38% from two or more races. Hispanic or Latino of any race were 47.38% of the population.
There were 2,099 households out of which 48.2% had children under the age of 18 living with them, 61.0% were married couples living together, 13.1% had a female householder with no husband present, and 20.1% were non-families. 16.9% of all households were made up of individuals and 6.4% had someone living alone who was 65 years of age or older. The average household size was 3.23 and the average family size was 3.62.
In the city, the population was spread out with 34.4% under the age of 18, 10.4% from 18 to 24, 30.9% from 25 to 44, 17.7% from 45 to 64, and 6.6% who were 65 years of age or older. The median age was 29 years. For every 100 females, there were 103.9 males. For every 100 females age 18 and over, there were 100.6 males.
The median income for a household in the city was $40,917, and the median income for a family was $45,348. Males had a median income of $34,368 versus $23,849 for females. The per capita income for the city was $15,649. About 11.3% of families and 13.3% of the population were below the poverty line, including 15.3% of those under age 18 and 17.2% of those age 65 or over.