Racial and ethnic composition 2020 census As of the
2020 census, Sugar Grove had a population of 9,278. The population density was . Housing density averaged . The median age was 42.0 years. 24.2% of residents were under the age of 18 and 15.9% of residents were 65 years of age or older. For every 100 females there were 100.0 males, and for every 100 females age 18 and over there were 95.0 males age 18 and over. 97.3% of residents lived in urban areas, while 2.7% lived in rural areas. There were 3,342 households in Sugar Grove, of which 37.0% had children under the age of 18 living in them. Of all households, 68.9% were married-couple households, 10.3% were households with a male householder and no spouse or partner present, and 16.5% were households with a female householder and no spouse or partner present. About 17.0% of all households were made up of individuals and 7.2% had someone living alone who was 65 years of age or older. There were 3,464 housing units, of which 3.5% were vacant. The homeowner vacancy rate was 1.6% and the rental vacancy rate was 8.4%.
Income and poverty The median income for a household in the village was $110,607, and the median income for a family was $121,199. Males had a median income of $69,219 versus $40,315 for females. The
per capita income for the village was $46,950. About 2.5% of families and 3.8% of the population were below the
poverty line, including 1.4% of those under age 18 and 13.8% of those age 65 or over. ==Transportation and utilities==