Rock Grove township Flag

Rock Grove township

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.

1.4K
Total Population
47
Density (mi²)
-15 -1.05%
Growth

Rock Grove township Population

Rock Grove township Population

Data after 2023 is projected based on recent change

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)
White1,56996.32%
Asian231.41%
Two or more races191.17%
Black or African American181.1%

Rock Grove township Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)