Ottawa is a city in, and the county seat of, Franklin County, Kansas, United States. It is located on both banks of the Marais des Cygnes River near the center of Franklin County. As of the 2010 census, the city population was 12,649.
Ottawa straddles the Marais des Cygnes River and is located 58 miles (93 km) southwest of Kansas City at the junction of U.S. Route 59 and K-68. U.S. Route 50 and Interstate 35 bypass Ottawa to the south and east, while business US-50 passes through the city.
According to the United States Census Bureau, the city has a total area of 9.42 square miles (24.40 km), of which 9.32 square miles (24.14 km) is land and 0.10 square miles (0.26 km) is water.
As of the census of 2010, there were 12,649 people, 4,998 households, and 3,127 families residing in the city. The population density was 1,357.2 inhabitants per square mile (524.0/km). There were 5,518 housing units at an average density of 592.1 per square mile (228.6/km). The racial makeup of the city was 91.0% White, 2.2% African American, 0.9% Native American, 0.4% Asian, 1.6% from other races, and 3.9% from two or more races. Hispanic or Latino of any race were 5.0% of the population.
There were 4,998 households of which 34.4% had children under the age of 18 living with them, 44.6% were married couples living together, 12.8% had a female householder with no husband present, 5.1% had a male householder with no wife present, and 37.4% were non-families. 31.5% of all households were made up of individuals and 13.5% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 3.08.
The median age in the city was 33.2 years. 27% of residents were under the age of 18; 11.5% were between the ages of 18 and 24; 25.5% were from 25 to 44; 22.9% were from 45 to 64; and 13.2% were 65 years of age or older. The gender makeup of the city was 48.5% male and 51.5% female.
As of the U.S. Census in 2000, there were 11,921 people, 4,697 households, and 3,034 families residing in the city. The population density was 1,781.0 people per square mile (688.0/km²). There were 5,080 housing units at an average density of 759.0 per square mile (293.2/km²). The racial makeup of the city was 92.77% White, 2.31% Black or African American, 1.22% Native American or Alaska Native, 0.53% Asian, 0.01% Pacific Islander, 1.31% from other races, and 1.86% from two or more races. Hispanic or Latino of any race were 4.16% of the population.
There were 4,697 households out of which 33.2% had children under the age of 18 living with them, 49.1% were married couples living together, 10.9% had a female householder with no husband present, and 35.4% were non-families. 30.5% of all households were made up of individuals, and 14.4% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.00.
In the city, the population was spread out with 26.6% under the age of 18, 11.5% from 18 to 24, 27.7% from 25 to 44, 18.3% from 45 to 64, and 15.8% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 95.1 males. For every 100 females age 18 and over, there were 89.0 males.
The median income for a household in the city was $34,071, and the median income for a family was $41,710. Males had a median income of $30,050 versus $22,891 for females. The per capita income for the city was $16,840. About 6.8% of families and 9.0% of the population were below the poverty line, including 10.0% of those under age 18 and 8.1% of those age 65 or over.
Ottawa Kansas neighborhoods include: Eisenhower / W 13th, Hawthorne District, North Side Ottawa, South Ottawa, Willow Heights