Knox County was organized by the Territorial Legislature in 1857, and named L'Eau Qui Court, that being the French name for the river named by thePonca Niobrara—both names meaning, in English, Running Water. The name was changed to Knox by a statute passed February 21, 1873, which took effect April 1, 1873.[5][6]
Knox County lies along the north line of Nebraska. Its north boundary line abuts the south boundary line of the state ofSouth Dakota. The terrain of the county consists of low rolling hills sloped to the northeast; most of the flat terrain is used for agriculture. TheMissouri River flows eastward along the county's north boundary line. The Niobrara River enters the county's west boundary, flowing eastward then northward to drain into the Missouri River near the village ofNiobrara. A smaller drainage,Verdigre Creek, flows northward into the county through the western central part of the county, draining into the Niobrara River shortly upstream of that river's mouth.[7] The county has a total area of 1,140 square miles (3,000 km2), of which 1,108 square miles (2,870 km2) is land and 31 square miles (80 km2) (2.8%) is water.[8]
As of the2020 census, the county had a population of 8,391. The median age was 44.5 years. 24.5% of residents were under the age of 18 and 25.6% of residents were 65 years of age or older. For every 100 females there were 98.8 males, and for every 100 females age 18 and over there were 98.4 males age 18 and over.[21][18]
0.0% of residents lived in urban areas, while 100.0% lived in rural areas.[22]
There were 3,435 households in the county, of which 26.4% had children under the age of 18 living with them and 22.3% had a female householder with no spouse or partner present. About 31.5% of all households were made up of individuals and 16.7% had someone living alone who was 65 years of age or older.[21]
There were 4,502 housing units, of which 23.7% were vacant. Among occupied housing units, 75.4% were owner-occupied and 24.6% were renter-occupied. The homeowner vacancy rate was 1.9% and the rental vacancy rate was 10.4%.[21]
There were 3,811 households, out of which 29.30% had children under the age of 18 living with them, 59.00% were married couples living together, 6.00% had a female householder with no husband present, and 31.90% were non-families. 29.90% of all households were made up of individuals, and 17.40% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.98.
The county population contained 25.50% under the age of 18, 5.50% from 18 to 24, 21.90% from 25 to 44, 23.90% from 45 to 64, and 23.10% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 96.70 males. For every 100 females age 18 and over, there were 95.20 males.
The median income for a household in the county was $27,564, and the median income for a family was $34,073. Males had a median income of $23,373 versus $18,319 for females. Theper capita income for the county was $13,971. About 12.50% of families and 15.60% of the population were below thepoverty line, including 20.40% of those under age 18 and 13.50% of those age 65 or over.
^"Knox County". Nebraska Association of County Officials. RetrievedDecember 19, 2014.
^Fitzpatrick, Lilian Linder (1925).Nebraska Place-Names. Lincoln: University of Nebraska Studies in Language, Literature, and Criticism. p. 88. RetrievedDecember 19, 2014.