Coyville was laid out in 1886 when the Atchison, Topeka and Santa Fe Railway was extended to that point. The town was named for Oscar Coy, a store owner who in 1866 served as the first postmaster.
Geography
Coyville is located at ,. According to the United States Census Bureau, the city has a total area of, all land.
As of the census of 2010, there were 46 people, 26 households, and 8 families residing in the city. The population density was. There were 34 housing units at an average density of. The racial makeup of the city was 80.4% White, 2.2% Native American, 8.7% from other races, and 8.7% from two or more races. Hispanic or Latino of any race were 2.2% of the population. There were 26 households of which 19.2% had children under the age of 18 living with them, 26.9% were married couplesliving together, 3.8% had a male householder with no wife present, and 69.2% were non-families. 65.4% of all households were made up of individuals and 23.1% had someone living alone who was 65 years of age or older. The average household size was 1.77 and the average family size was 3.38. The median age in the city was 49.6 years. 23.9% of residents were under the age of 18; 8.6% were between the ages of 18 and 24; 6.6% were from 25 to 44; 43.5% were from 45 to 64; and 17.4% were 65 years of age or older. The gender makeup of the city was 45.7% male and 54.3% female.
2000 census
As of the census of 2000, there were 71 people, 28 households, and 18 families residing in the city. The population density was 257.9 people per square mile. There were 39 housing units at an average density of 141.7 per square mile. The racial makeup of the city was 98.59% White, and 1.41% from two or more races. There were 28 households out of which 35.7% had children under the age of 18 living with them, 57.1% were married couples living together, 7.1% had a female householder with no husband present, and 35.7% were non-families. 32.1% of all households were made up of individuals and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 3.17. In the city, the population was spread out with 35.2% under the age of 18, 2.8% from 18 to 24, 25.4% from 25 to 44, 16.9% from 45 to 64, and 19.7% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 77.5 males. For every 100 females age 18 and over, there were 91.7 males. The median income for a household in the city was $19,792, and the median income for a family was $59,375. Males had a median income of $47,750 versus $18,750 for females. The per capita income for the city was $15,012. There were no families and 6.7% of the population living below the poverty line, including no under eighteens and 28.6% of those over 64.
