Ellis is a city in Ellis County, Kansas, United States. As of the 2010 census, the city population was 2,062.
Ellis is located at 38°56′10″N 99°33′33″W / 38.93611°N 99.55917°W / 38.93611; -99.55917 (38.936211, -99.559269), at an elevation of 2,119 feet (646 m). Located in northwestern Kansas on Interstate 70, Ellis is 13 miles (21 km) west-northwest of Hays, the county seat. It is approximately 146 miles (235 km) northwest of Wichita and 260 miles (420 km) west of Kansas City.
Ellis lies on the western edge of the Smoky Hills region of the Great Plains. Big Creek, a tributary of the Smoky Hill River, runs east through the city and has been dammed to form a long, narrow reservoir, Big Creek Lake.
According to the United States Census Bureau, the city has a total area of 1.64 square miles (4.25 km), all of it land.
As of the 2010 census, there were 2,062 people, 868 households, and 556 families residing in the city. The population density was 1,718.3 people per square mile (663.5/km²). There were 959 housing units at an average density of 799.2 per square mile (299.7/km²). The racial makeup of the city was 97.9% White, 0.2% African American, 1.0% from other races, and 0.8% from two or more races. Hispanics and Latinos of any race were 3.0% of the population.
There were 868 households of which 31.0% had children under the age of 18 living with them, 52.6% were married couples living together, 4.0% had a male householder with no wife present, 7.4% had a female householder with no husband present, and 35.9% were non-families. 31.5% of all households were made up of individuals, and 12.5% had someone living alone who was 65 years of age or older. The average household size was 2.32, and the average family size was 2.91.
In the city, the population was spread out with 25.1% under the age of 18, 6.7% from 18 to 24, 26.0% from 25 to 44, 26.7% from 45 to 64, and 15.5% who were 65 years of age or older. The median age was 38.1 years. For every 100 females, there were 90.9 males. For every 100 females age 18 and over, there were 88.6 males age 18 and over.
The median income for a household in the city was $40,682, and the median income for a family was $57,750. Males had a median income of $40,511 versus $25,982 for females. The per capita income for the city was $22,568. 6.8% of families and 10.9% of the population were below the poverty line, including 11.5% of those under age 18 and 13.8% of those age 65 or over.