Ziebach County, South Dakota

Ziebach County is a located in the  of. As of, the population is 2,519. Its is. The county's makes it one of the. It is alphabetically the last county in the nation.

Geography
According to the, the county has a total area of 5,105 (1,971 ). 5,082 km² (1,962 sq mi) of it is land and 23 km² (9 sq mi) of it (0.44%) is water. Almost the entire county lies within the. The balance of the county, along its extreme northern, lies within the. It is one of five South Dakota counties that lie entirely on Indian reservations.

Townships
The county is divided into three areas of unorganized territory: Dupree, North Ziebach, and South Ziebach.

Adjacent counties

 * - north
 * - east
 * - south
 * - southwest
 * - northwest

Demographics
As of the of 2000, there were 2,519 people, 741 households, and 594 families residing in the county. The was 0.5/km² (1.3/sq mi). There were 879 housing units at an average density of 0.2/km² (0.4/sq mi). The racial makeup of the county was 72.29%, 26.40% , 0.08% , 0.12% from , and 1.11% from two or more races. 0.99% of the population were or  of any race.

There were 741 households out of which 47.2% had children under the age of 18 living with them, 47.9% were living together, 23.8% had a female householder with no husband present, and 19.8% were non-families. 17.4% of all households were made up of individuals and 5.1% had someone living alone who was 65 years of age or older. The average household size was 3.40 and the average family size was 3.81.

In the county, the population was spread out with 40.6% under the age of 18, 10.8% from 18 to 24, 24.7% from 25 to 44, 16.5% from 45 to 64, and 7.5% who were 65 years of age or older. The median age was 24 years. For every 100 females there were 97.0 males. For every 100 females age 18 and over, there were 98.1 males.