Newton County is a county located in the southwest portion of the U.S. state of Missouri. As of the 2010 census, the population was 58,114. Its county seat is Neosho. The county was organized in 1838 and is named in honor of John Newton, a hero who fought in the Revolutionary War.
According to the U.S. Census Bureau, the county has a total area of 627 square miles (1,620 km), of which 625 square miles (1,620 km) is land and 1.8 square miles (4.7 km) (0.3%) is water.
As of the census of 2000, there were 52,636 people, 20,140 households, and 14,742 families residing in the county. The population density was 84 people per square mile (33.75/km²). There were 21,897 housing units at an average density of 35 per square mile (14/km²). The racial makeup of the county was 93.26% White, 0.59% Black or African American, 2.23% Native American, 0.32% Asian, 0.28% Pacific Islander, 1.12% from other races, and 2.20% from two or more races. 2.18% of the population were Hispanic or Latino of any race.
There were 20,140 households out of which 33.10% had children under the age of 18 living with them, 60.50% were married couples living together, 8.80% had a female householder with no husband present, and 26.80% were non-families. 22.70% of all households were made up of individuals and 9.70% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.00.
In the county, the population was spread out with 26.30% under the age of 18, 8.70% from 18 to 24, 27.10% from 25 to 44, 23.80% from 45 to 64, and 14.00% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 95.60 males. For every 100 females age 18 and over, there were 92.30 males.
The median income for a household in the county was $35,041, and the median income for a family was $40,616. Males had a median income of $30,057 versus $21,380 for females. The per capita income for the county was $17,502. About 8.10% of families and 11.60% of the population were below the poverty line, including 14.20% of those under age 18 and 9.50% of those age 65 or over.