Racial and ethnic composition 2020 census As of the
2020 census, Willow Springs had a population of 5,857. The median age was 47.1 years. 18.0% of residents were under the age of 18 and 21.6% were 65 years of age or older. For every 100 females, there were 99.1 males, and for every 100 females age 18 and over, there were 98.0 males age 18 and over. 99.8% of residents lived in urban areas, while 0.2% lived in rural areas. There were 2,426 households in Willow Springs, including 1,494 families. Of all households, 25.4% had children under the age of 18 living in them, 53.7% were married-couple households, 19.3% were households with a male householder and no spouse or partner present, and 22.0% were households with a female householder and no spouse or partner present. About 26.3% of all households were made up of individuals and 10.6% had someone living alone who was 65 years of age or older. The population density was . There were 2,545 housing units at an average density of , of which 4.7% were vacant. The homeowner vacancy rate was 1.4% and the rental vacancy rate was 6.6%.
Income and poverty The median income for a household in the village was $98,664, and the median income for a family was $123,531. Males had a median income of $61,136 versus $58,704 for females. The
per capita income for the village was $51,333. About 3.1% of families and 2.6% of the population were below the
poverty line, including 2.6% of those under age 18 and 2.3% of those age 65 or over. ==Government==