Kearney is the principal city of the Kearney, Nebraska Micropolitan Statistical Area, which consists of Buffalo and Kearney counties.
As of the census of 2000, there were 27,431 people, 10,549 households, and 6,160 families residing in the city. The population density was 2,498.5 people per square mile (964.6/km²). There were 11,099 housing units at an average density of 1,010.9/sq mi (390.3/km²). The racial makeup of the city was 95.18% White, 0.63% African American, 0.38% Native American, 0.92% Asian, 0.04% Pacific Islander, 1.68% from other races, and 1.17% from two or more races. Hispanic or Latino of any race were 4.08% of the population.
There were 10,549 households out of which 30.3% had children under the age of 18 living with them, 45.7% were married couples living together, 9.7% had a female householder with no husband present, and 41.6% were non-families. 28.7% of all households were made up of individuals and 9.5% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.96.
In the city the population was spread out with 22.2% under the age of 18, 23.9% from 18 to 24, 26.2% from 25 to 44, 17.1% from 45 to 64, and 10.6% who were 65 years of age or older. The median age was 27 years. For every 100 females there were 92.6 males. For every 100 females age 18 and over, there were 89.7 males.
The median income for a household in the city was $34,829, and the median income for a family was $46,650. Males had a median income of $30,150 versus $22,366 for females. The per capita income for the city was $17,713. About 7.4% of families and 13.4% of the population were below the poverty line, including 11.8% of those under age 18 and 8.9% of those age 65 or over.