In 2004, the city of Wichita had an estimated population of 353,823, which is an increase of 9,539, or 2.8%, since the year 2000.

In 2003 the Wichita Metropolitan Statistical Area had an estimated population of 582,781, which is an increase of 11,613, or 2.0%, since the year 2000. This includes a natural increase of 13,451 people (that is 29,063 births minus 15,612 deaths) and a decrease due to net migration of 1,508 people out of the metropolitan area. Immigration from outside the United States resulted in a net increase of 5,415 people, and migration within the country produced a net loss of 6,923 people.

As of the census of 2000, there were 344,284 people, 139,087 households, and 87,763 families residing in the city. The population density was 2,536.1/mi² (979.2/km²). There were 152,119 housing units at an average density of 1,120.6/mi² (432.7/km²). The racial makeup of the city was 75.20% White, 11.42% African American, 1.16% Native American, 3.96% Asian, 0.06% Pacific Islander, 5.10% from other races, and 3.10% from two or more races. Hispanic or Latino residents of any race were 9.62% of the population.

There were 139,087 households out of which 32.1% had children under the age of 18 living with them, 47.3% were married couples living together, 11.6% had a female householder with no husband present, and 36.9% were non-families. 31.2% of all households were made up of individuals and 9.3% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 3.10.

In the city the population was spread out with 27.1% under the age of 18, 10.1% from 18 to 24, 30.7% from 25 to 44, 20.2% from 45 to 64, and 11.9% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 97.1 males. For every 100 females age 18 and over, there were 94.6 males.

The median income for a household in the city was $39,939, and the median income for a family was $49,247. Males had a median income of $36,457 versus $25,844 for females. The per capita income for the city was $20,647. About 8.4% of families and 11.2% of the population were below the poverty line, including 14.4% of those under age 18 and 7.6% of those age 65 or over.

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