As of the census of 2000, there were 53,011 people, 22,324 households, and 14,175 families residing in Cheyenne, making it the largest city in the state of Wyoming. The population density was 969.6/km² (2,511.4/mi²). There were 23,782 housing units at an average density of 435.0/km² (1,126.7/mi²). The racial makeup of the city was 88.11% White, 2.78% Black or African American, 0.81% Native American, 1.06% Asian, 0.11% Pacific Islander, 4.44% from other races, and 2.69% from two or more races. 12.54% of the population were Hispanic or Latino of any race.

There were 22,324 households out of which 30.4% had children under the age of 18 living with them, 49.2% were married couples living together, 10.6% had a female householder with no husband present, and 36.5% were non-families. 31.3% of all households were made up of individuals and 10.6% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.93.

In the city the population was spread out with 24.9% under the age of 18, 8.8% from 18 to 24, 29.7% from 25 to 44, 22.8% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 95.3 males. For every 100 females age 18 and over, there were 92.7 males.

The median income for a household in the city was $38,856, and the median income for a family was $46,771. Males had a median income of $32,286 versus $24,529 for females. The per capita income for the city was $19,809. About 6.3% of families and 8.8% of the population were below the poverty line, including 11.1% of those under age 18 and 5.8% of those age 65 or over.

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