Sioux County, North Dakota

Sioux County is a located in the  of. As of, the population is 4,044. Its is.

The county lies entirely within the, forming the northernmost 30 percent of the reservation. (The balance of the reservation is in .) It is the only county in North Dakota that is entirely within an.

Geography
According to the, the county has a total area of 2,922 (1,128 ). 2,834 km² (1,094 sq mi) of it is land and 89 km² (34 sq mi) of it (3.03%) is water.

Townships

 * Menz

Adjacent counties

 * (north)
 * (east)
 * (south)
 * (west)
 * (northwest)

Demographics
As of the of 2000, there were 4,044 people, 1,095 households, and 871 families residing in the county. The was 1/km² (4/sq mi). There were 1,216 housing units at an average density of 0/km² (1/sq mi). The racial makeup of the county was 84.59%, 14.34% , 0.02% or , 0.02% , 0.05% , 0.07% from , and 0.89% from two or more races. 1.61% of the population were or  of any race.

There were 1,095 households out of which 48.90% had children under the age of 18 living with them, 39.10% were living together, 29.10% had a female householder with no husband present, and 20.40% were non-families. 16.60% of all households were made up of individuals and 4.40% had someone living alone who was 65 years of age or older. The average household size was 3.63 and the average family size was 3.98.

In the county the population was spread out with 40.30% under the age of 18, 11.10% from 18 to 24, 26.90% from 25 to 44, 16.20% from 45 to 64, and 5.60% who were 65 years of age or older. The median age was 24 years. For every 100 females there were 104.20 males. For every 100 females age 18 and over, there were 99.70 males.

The median income for a household in the county was $22,483, and the median income for a family was $24,000. Males had a median income of $22,039 versus $19,458 for females. The for the county was $7,731. About 33.60% of families and 39.20% of the population were below the, including 44.40% of those under age 18 and 25.80% of those age 65 or over. The county's makes it one of the.

Cities
Note: all incorporated communities in North Dakota are called "cities" regardless of their size.