As of the census of 2000, there were 146,866 people, 55,500 households, and 36,241 families residing in the city. The population density was 1,181.9 people per square mile (456.3/km²). There were 61,446 housing units at an average density of 494.5/sq mi (190.9/km²). The racial makeup of the city was 55.7% White, 30.12% African American, 0.75% Native American, 1.72% Asian, 0.04% Pacific Islander, 8.61% from other races, and 2.99% from two or more races. Hispanic or Latino of any race were 16.78% of the population.
There were 55,500 households out of which 32.5% had children under the age of 18 living with them, 41.2% were married couples living together, 18.2% had a female householder with no husband present, and 34.7% were non-families. 29.2% of all households were made up of individuals and 9.9% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.25.
In the city the population was spread out with 28.6% under the age of 18, 10.6% from 18 to 24, 29.5% from 25 to 44, 19.8% from 45 to 64, and 11.6% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 95.6 males. For every 100 females age 18 and over, there were 91.7 males.
The median income for a household in the city was $33,011, and the median income for a family was $39,491. Males had a median income of $30,992 versus $24,543 for females. The per capita income for the city was $15,737. About 13.0% of families and 17.1% of the population were below the poverty line, including 23.8% of those under age 18 and 11.5% of those age 65 or over.
Kansas City owes its existence to its location as a crossroads. It was at the confluence of the Missouri River and Kansas River and the launching pointing for travelers on the Santa Fe, Oregon, and California trails. Missouri and Kansas were the first states to start building interstates with Interstate 70. An ever increasing number of interstate loops has encouraged suburban sprawl.