According to the 2010 census, Spring Grove has a total area of 8.711 square miles (22.56 km2), of which 8.68 square miles (22.48 km2) (or 99.64%) is land and 0.031 square miles (0.08 km2) (or 0.36%) is water.[5]
Spring Grove village, Illinois – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
As of the census[10] of 2000, there were 3,880 people, 1,166 households, and 1,045 families residing in the village. The population density was 624.7 inhabitants per square mile (241.2/km2). There were 1,205 housing units at an average density of 194.0 per square mile (74.9/km2). The racial makeup of the village was 97.37% White, 0.13% African American, 0.15% Native American, 0.90% Asian, 0.10% Pacific Islander, 0.36% from other races, and 0.98% from two or more races. Hispanic or Latino of any race were 1.78% of the population.
There were 1,166 households, out of which 54.5% had children under the age of 18 living with them, 84.5% were married couples living together, 3.7% had a female householder with no husband present, and 10.3% were non-families. 7.5% of all households were made up of individuals, and 2.2% had someone living alone who was 65 years of age or older. The average household size was 3.33 and the average family size was 3.52.
In the village, the population was spread out, with 35.3% under the age of 18, 4.9% from 18 to 24, 33.7% from 25 to 44, 20.8% from 45 to 64, and 5.3% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 100.8 males. For every 100 females age 18 and over, there were 96.9 males.
The median income for a household in the village was $80,542, and the median income for a family was $82,996. Males had a median income of $60,933 versus $33,882 for females. The per capita income for the village was $25,506. About 1.7% of families and 2.4% of the population were below the poverty line, including 2.3% of those under age 18 and none of those age 65 or over.
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