Rapid City is the second-largest city in South Dakota, and the county seat of Pennington County. Named after Rapid Creek on which the city is established, it is set against the eastern slope of the Black Hills mountain range. The population was 67,956 as of the 2010 Census. Rapid City is known as the “Gateway to the Black Hills” and the “City of Presidents”. The city is split by a low mountain ridge that divides the western and eastern parts of the city.
The median age in the city was 35.6 years. 23.9% of residents were under the age of 18; 10.6% were between the ages of 18 and 24; 25.7% were from 25 to 44; 25% were from 45 to 64; and 14.5% were 65 years of age or older. The gender makeup of the city was 49.5% male and 50.5% female.
As of 2000 the median income for a household in the city was $35,978, and the median income for a family was $44,818. Males had a median income of $30,985 versus $21,913 for females. The per capita income for the city was $19,445. About 9.4% of families and 12.7% of the population were below the poverty line, including 17.6% of those under age 18 and 6.9% of those age 65 or over.