Yukon is the hometown of country singer Garth Brooks, actor Dale Robertson, 2001 Miss Oklahoma USA Cortney Phillips and the red dirt band Cross Canadian Ragweed. In 1949, Yukon garnered national media attention because of the plight of Grady the Cow.
The Czech Hall, a national and state historic site, is devoted to preserving Czech customs, heritage, and culture. Community events include the Czech Festival in October, and the Chisholm Trail Festival in June. Yukon's sister city is Krnov in the Czech Republic.
As of the census of 2000, there were 21,043 people, 7,830 households, and 5,989 families residing in the city. The population density was 816.8 people per square mile (315.4/km²). There were 8,135 housing units at an average density of 315.8/sq mi (121.9/km²). The racial makeup of the city was 90.93% White, 0.36% African American, 2.68% Native American, 1.87% Asian, 0.05% Pacific Islander, 1.22% from other races, and 2.41% from two or more races. Hispanic or Latino of any race were 3.01% of the population.
There were 7,830 households out of which 39.7% had children under the age of 18 living with them, 62.1% were married couples living together, 11.0% had a female householder with no husband present, and 23.5% were non-families. 20.7% of all households were made up of individuals and 8.6% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.06.
In the city the population was spread out with 27.7% under the age of 18, 8.3% from 18 to 24, 29.3% from 25 to 44, 23.9% from 45 to 64, and 10.7% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 91.2 males. For every 100 females age 18 and over, there were 87.6 males.
The median income for a household in the city was $45,265, and the median income for a family was $52,646. Males had a median income of $36,516 versus $25,014 for females. The per capita income for the city was $19,773. About 5.0% of families and 6.6% of the population were below the poverty line, including 8.2% of those under age 18 and 4.3% of those age 65 or over.