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 2026 population of 1,441. Rock Grove township is currently declining at a rate of -0.41% annually and its population has decreased by -3.61% since the most recent census, which recorded a population of 1,495 in 2020.

The median household income in Rock Grove township is $99,500 with a poverty rate of 7.09%. The median age in Rock Grove township is 49.6 years: 54.1 years for males, and 39.6 years for females. For every 100 females there are 87.9 males.

1.4K
Total Population
48
Density (mi²)
-6 -0.41%
Growth

Rock Grove township Population

Rock Grove township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,441-6-0.41%
20251,447-6-0.41%
20241,453-6-0.41%
20231,459-10-0.68%
20221,469-12-0.81%
20211,481-14-0.94%
20201,495-4-0.27%
20191,311-8-0.61%
20181,319-6-0.45%
20171,325-14-1.05%
20161,339-3-0.22%
20151,342-17-1.25%
20141,359-9-0.66%
20131,368-4-0.29%
20121,372-11-0.8%
20111,383-5-0.36%
20101,387-1-0.07%

Median Age

Overall: 49.6 years
Female: 39.6 years
Male: 54.1 years

Rock Grove township Adults

There are 1,143 adults, (488 of whom are seniors) in Rock Grove township.

Sex Ratio

Female: 818 (53.2%)
Male: 719 (46.8%)

Demographics

The racial composition of Rock Grove township includes 91.54% White, and smaller percentages for Black or African American, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White1,40791.54%
Two or more races895.79%
Black or African American241.56%
Asian171.11%
Race
Population ↓
Percentage (of total)
Two or more races322.08%
Race
Population ↓
Percentage (of total)
White1,40791.54%
Two or more races573.71%
Black or African American241.56%
Asian171.11%

Rock Grove township Marital Status

Economics and Income Statistics

Rock Grove township 's average per capita income is $79,808. Household income levels show a median of $99,500. The poverty rate stands at 7.09%.

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$117,599-
Households$99,500$123,158
Families$89,886$120,137
Non Families$83,147$102,807

$79,808

Average Income

$99,500

Median Household Income

7.09%

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)