Willow Lake is a city in Clark County, South Dakota, United States. The population was 255 at the 2020 census.
The city took its name from Willow Lake, a natural lake near the town site.
Geography
According to the United States Census Bureau, the city has a total area of , all land.
Demographics
2020 census
As of the 2020 census, Willow Lake had a population of 255. The median age was 33.9 years. 32.5% of residents were under the age of 18 and 18.0% of residents were 65 years of age or older. For every 100 females there were 90.3 males, and for every 100 females age 18 and over there were 100.0 males age 18 and over.
0.0% of residents lived in urban areas, while 100.0% lived in rural areas.
There were 102 households in Willow Lake, of which 21.6% had children under the age of 18 living in them. Of all households, 51.0% were married-couple households, 23.5% were households with a male householder and no spouse or partner present, and 23.5% were households with a female householder and no spouse or partner present. About 44.1% of all households were made up of individuals and 18.6% had someone living alone who was 65 years of age or older.
! Race !! Number !! Percent
|-
| White || 244 || 95.7%
|-
| Black or African American || 0 || 0.0%
|-
| American Indian and Alaska Native || 2 || 0.8%
|-
| Asian || 0 || 0.0%
|-
| Native Hawaiian and Other Pacific Islander || 0 || 0.0%
|-
| Some other race || 7 || 2.7%
|-
| Two or more races || 2 || 0.8%
|-
| Hispanic or Latino (of any race) || 18 || 7.1%
|}
2010 census
As of the census of 2010, there were 263 people, 115 households, and 68 families residing in the city. The population density was . There were 129 housing units at an average density of . The racial makeup of the city was 92.0% White, 7.2% from other races, and 0.8% from two or more races. Hispanic or Latino of any race were 8.0% of the population.
There were 115 households, of which 27.0% had children under the age of 18 living with them, 44.3% were married couples living together, 9.6% had a female householder with no husband present, 5.2% had a male householder with no wife present, and 40.9% were non-families. 37.4% of all households were made up of individuals, and 23.5% had someone living alone who was 65 years of age or older. The average household size was 2.29 and the average family size was 3.03.
The median age in the city was 42.2 years. 26.2% of residents were under the age of 18; 11.9% were between the ages of 18 and 24; 14.4% were from 25 to 44; 28.9% were from 45 to 64; and 18.6% were 65 years of age or older. The gender makeup of the city was 50.6% male and 49.4% female.
2000 census
As of the census