Yankton is a city in, and the County seat of, Yankton County, South Dakota, U.S. The population was 14,454 at the 2010 census. Yankton is the principal city of the Yankton Micropolitan Statistical Area, which includes the entirety of Yankton County and which had an estimated population of 22,662 as of July 1, 2017. Yankton was the first capital of Dakota Territory. It is named for the Yankton tribe of Western Dakota people; Yankton is derived from the Dakota word I-hank-ton-wan (“the end village”).
Yankton is located at 42°52′54″N 97°23′33″W / 42.88167°N 97.39250°W / 42.88167; -97.39250 (42.881647, −97.392485). in southern South Dakota on the state’s border with Nebraska. The city is located on one of the last free-flowing, natural stretches of the Missouri River; this segment of the river, between Gavins Point Dam four miles west of Yankton, and Ponca State Park in Nebraska, has been designated by the U.S. National Park Service as the Missouri National Recreational River.
The city is located approximately six miles west of the point where the James River flows into the Missouri.
The central business district of the city is located on a natural landing along the Missouri River, and city rises in the west to “Mount Marty” (actually a high bluff along the river). The city is also intersected by the Marne Creek, which also flows into the Missouri River. Lewis and Clark Lake is located four miles west of the city.
According to the United States Census Bureau, the city has a total area of 8.45 square miles (21.89 km), of which, 8.21 square miles (21.26 km) is land and 0.24 square miles (0.62 km) is water.
Yankton has been assigned the ZIP codes 57078-57079 and the FIPS place code 73060.
As of the census of 2010, there were 14,454 people, 5,909 households, and 3,348 families residing in the city. The population density was 1,760.5 inhabitants per square mile (679.7/km). There were 6,365 housing units at an average density of 775.3 per square mile (299.3/km). The racial makeup of the city was 92.1% White, 2.1% African American, 2.3% Native American, 0.7% Asian, 1.3% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 3.4% of the population.
There were 5,909 households of which 27.3% had children under the age of 18 living with them, 43.1% were married couples living together, 10.1% had a female householder with no husband present, 3.5% had a male householder with no wife present, and 43.3% were non-families. 37.5% of all households were made up of individuals and 15.2% had someone living alone who was 65 years of age or older. The average household size was 2.17 and the average family size was 2.87.
The median age in the city was 40.4 years. 20.9% of residents were under the age of 18; 9% were between the ages of 18 and 24; 26% were from 25 to 44; 26.1% were from 45 to 64; and 17.9% were 65 years of age or older. The gender makeup of the city was 50.5% male and 49.5% female.
As of the census of 2000, there were 13,528 people, 5,369 households, and 3,232 families residing in the city. The population density was 1,743.2 people per square mile (673.1/km²). There were 5,735 housing units at an average density of 739.0 per square mile (285.3/km²). The racial makeup of the city was 94.35% White, 1.64% African American, 1.58% Native American, 0.50% Asian, 0.03% Pacific Islander, 0.90% from other races, and 0.99% from two or more races. Hispanic or Latino of any race were 2.46% of the population.
There were 5,369 households out of which 29.5% had children under the age of 18 living with them, 47.5% were married couples living together, 9.8% had a female householder with no husband present, and 39.8% were non-families. 34.9% of all households were made up of individuals and 15.0% had someone living alone who was 65 years of age or older. The average household size was 2.27 and the average family size was 2.96.
In the city, the population was spread out with 23.4% under the age of 18, 9.8% from 18 to 24, 28.2% from 25 to 44, 21.4% from 45 to 64, and 17.2% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 96.1 males. For every 100 females age 18 and over, there were 95.0 males.
As of 2000 the median income for a household in the city was $31,843, and the median income for a family was $44,009. Men had a median income of $29,012 versus $20,577 for women. The per capita income for the city was $17,954. About 6.2% of families and 10.2% of the population were below the poverty line, including 10.8% of those under age 18 and 9.1% of those age 65 or over.
According to the 2003 Coldwell Banker Housing Price Comparison Index (HPCI), Yankton was found to have the lowest housing costs of any municipal entity in the entire United States. This is no longer the case as of the 2005 HPCI.