Mill Creek is a town in Johnston County, Oklahoma, United States. The population was 319 at the 2010 census, a loss from 340 at the 2000 census. Mill Creek Community is an unincorporated area of Johnston County that surrounds the town and claims to have about 1,000 residents, including those that live within the town limits. Local residents consider the town as the focal point of the community.
Mill Creek is located in northern Johnston County at 34°24′04″N 96°49′31″W / 34.401179°N 96.825189°W / 34.401179; -96.825189.
According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.0 km), all of it land.
As of the census of 2000, there were 340 people, 125 households, and 93 families residing in the town. The population density was 896.4 people per square mile (345.5/km). There were 147 housing units at an average density of 387.5 per square mile (149.4/km). The racial makeup of the town was 59.12% White, 30.00% Native American, 1.47% Asian, 0.29% from other races, and 9.12% from two or more races. Hispanic or Latino of any race were 0.88% of the population.
There were 125 households out of which 36.8% had children under the age of 18 living with them, 58.4% were married couples living together, 13.6% had a female householder with no husband present, and 25.6% were non-families. 24.0% of all households were made up of individuals and 12.8% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.23.
In the town, the population was spread out with 30.0% under the age of 18, 7.1% from 18 to 24, 28.8% from 25 to 44, 20.3% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 91.0 males. For every 100 females age 18 and over, there were 84.5 males.
The median income for a household in the town was $24,479, and the median income for a family was $26,250. Males had a median income of $29,500 versus $16,250 for females. The per capita income for the town was $10,661. About 23.4% of families and 28.7% of the population were below the poverty line, including 43.0% of those under age 18 and 20.5% of those age 65 or over.