Montgomery County (county code MG) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 35,471. Its county seat is Independence, and its most populous city is Coffeyville.
According to the U.S. Census Bureau, the county has a total area of 651 square miles (1,690 km), of which 644 square miles (1,670 km) is land and 8.0 square miles (21 km) (1.2%) is water. The lowest point in the state of Kansas is located on the Verdigris River in Cherokee Township in Montgomery County (just southeast of Coffeyville), where it flows out of Kansas and into Oklahoma. Western portions of the county contain parts of the northern Cross Timbers eco-region, which separates the forested eastern portion of the United States with the Plains.
The Coffeyville Micropolitan Statistical Area includes all of Montgomery County.
As of the 2000 census, there were 36,252 people, 14,903 households, and 9,955 families residing in the county. The population density was 56 people per square mile (22/km). There were 17,207 housing units at an average density of 27 per square mile (10/km). The racial makeup of the county was 85.77% White, 6.07% Black or African American, 3.19% Native American, 0.47% Asian, 0.02% Pacific Islander, 1.13% from other races, and 3.34% from two or more races. Hispanic or Latino of any race were 3.08% of the population.
There were 14,903 households out of which 29.80% had children under the age of 18 living with them, 53.00% were married couples living together, 10.10% had a female householder with no husband present, and 33.20% were non-families. 29.70% of all households were made up of individuals and 14.70% 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 2.93.
In the county, the population was spread out with 25.00% under the age of 18, 8.60% from 18 to 24, 24.70% from 25 to 44, 23.30% from 45 to 64, and 18.30% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 93.20 males. For every 100 females age 18 and over, there were 88.60 males.
The median income for a household in the county was $30,997, and the median income for a family was $38,516. Males had a median income of $29,745 versus $20,179 for females. The per capita income for the county was $16,421. About 9.20% of families and 12.60% of the population were below the poverty line, including 16.80% of those under age 18 and 10.90% of those age 65 or over.