South Willard is a census-designated place (CDP) in Box Elder County, Utah, United States. The population was 1,840 at the 2020 census.
Geography
According to the United States Census Bureau, the CDP has a total area of 5.8 square miles (15.1 km<sup>2</sup>), all land.
Demographics
2020 census
As of the 2020 census, South Willard had a population of 1,840. The median age was 36.4 years. 33.3% of residents were under the age of 18 and 9.0% of residents were 65 years of age or older. For every 100 females there were 106.3 males, and for every 100 females age 18 and over there were 103.1 males age 18 and over.
89.1% of residents lived in urban areas, while 10.9% lived in rural areas.
There were 568 households in South Willard, of which 45.6% had children under the age of 18 living in them. Of all households, 69.7% were married-couple households, 14.4% were households with a male householder and no spouse or partner present, and 10.6% were households with a female householder and no spouse or partner present. About 15.2% of all households were made up of individuals and 4.8% had someone living alone who was 65 years of age or older.