Rock Grove township

County:: Stephenson County
County Seat:: No
Area (mi²):: 30.288
State:: Illinois

Rock Grove township is located in Stephenson County, Illinois. Rock Grove township has a 2025 population of 1,420. Rock Grove township is currently declining at a rate of -1.05% annually and its population has decreased by -4.89% since the most recent census, which recorded a population of 1,493 in 2020.

The average household income in Rock Grove township is $112,579 with a poverty rate of 9.94%.The median age in Rock Grove township is 40.5 years: 49.6 years for males, and 39.1 years for females.

Demographics

The racial composition of Rock Grove township includes 96.32% White, and smaller percentages for Asian, Two or more races, Black or African American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	1,569	96.32%
Asian	23	1.41%
Two or more races	19	1.17%
Black or African American	18	1.1%

Rock Grove township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Rock Grove township's average per capita income is $70,481. Household income levels show a median of $84,700. The poverty rate stands at 9.94%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$107,292	-
Families	$84,800	$114,054
Households	$84,700	$112,579
Non Families	$77,155	$85,570

$70,481

Average Income

$84,700

Median Household Income

9.94%

Poverty Rate