Hill City, Kansas  Hill City is a city in and the county seat of Graham County, Kansas, United States. As of the 2010 census, the city population was 1,474. The first settlement at Hill City was made in 1876, making it the oldest town in Graham County. The community was named after W. R. Hill, a first settler. Hill City was platted in 1878. The first post office in Hill City was established in September 1878. Hill City was designated county seat in 1880. By 1915, Hill City had 647 inhabitants. Hill City is located at (39.367319, -99.845558). According to the United States Census Bureau, the city has a total area of , all land. On June 9, 2005 a large tornado passed 1 mile south of Hill City. And again hit by a large tornado just north of the city on June 20, 2011. On June 26, 2012 the temperature reached 115 °F (46 °C), breaking the June record tied just 2 days earlier and during the Dust Bowl on June 30, 1933. The town was the hottest city in the United States for four days in a row with temperatures of 114°, 111°, 115°, and 115 °F (46°, 44°, 46°, and 46 °C). As of the census of 2010, there were 1,474 people, 669 households, and 404 families residing in the city. The population density was . There were 783 housing units at an average density of . The racial makeup of the city was 91.2% White, 4.5% African American, 0.8% Native American, 0.3% Asian, 0.3% from other races, and 2.8% from two or more races. Hispanic or Latino of any race were 2.5% of the population. There were 669 households of which 24.2% had children under the age of 18 living with them, 49.8% were married couples living together, 6.9% had a female householder with no husband present, 3.7% had a male householder with no wife present, and 39.6% were non-families. 35.4% of all households were made up of individuals and 19.6% had someone living alone who was 65 years of age or older. The average household size was 2.14 and the average family size was 2.76. The median age in the city was 48 years. 20.8% of residents were under the age of 18; 6.2% were between the ages of 18 and 24; 19% were from 25 to 44; 29.9% were from 45 to 64; and 23.9% were 65 years of age or older.