Mankato is the larger of the two principal cities of the Mankato-North Mankato metropolitan area, which covers Blue Earth and Nicollet counties and had a combined population of 85,712 at the 2000 census. Mankato was designated a Metropolitan Statistical Area by the U.S. Census Bureau in November of 2008.
U.S. Routes 14 and 169 and Minnesota State Highways 22, and 60 are four of the main arterial routes in the city.
As of the census of 2000, there were 32,427 people, 12,367 households, and 6,059 families residing in the city. The population density was 2,132.5 people per square mile (823.2/km²). There were 12,759 housing units at an average density of 839.1/sq mi (323.9/km²). The racial makeup of the city was 92.55% White, 1.90% African American, 0.34% Native American, 2.81% Asian, 0.10% Pacific Islander, 0.94% from other races, and 1.36% from two or more races. Hispanic or Latino of any race were 2.22% of the population.
There were 12,367 households out of which 23.6% had children under the age of 18 living with them, 36.7% were married couples living together, 8.8% had a female householder with no husband present, and 51.0% were non-families. 32.2% 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 2.31 and the average family size was 2.90.
In the city the population was spread out with 16.9% under the age of 18, 32.5% from 18 to 24, 23.9% from 25 to 44, 15.4% from 45 to 64, and 11.3% who were 65 years of age or older. The median age was 25 years. For every 100 females there were 96.7 males. For every 100 females age 18 and over, there were 95.5 males.
The median income for a household in the city was $33,956, and the median income for a family was $47,297. Males had a median income of $30,889 versus $22,081 for females. The per capita income for the city was $17,652. About 8.5% of families and 19.0% of the population were below the poverty line, including 15.6% of those under age 18 and 11.8% of those age 65 or over.