Rockbridge township Flag

Rockbridge township

County:
Greene County
County Seat:
No
Area (mi²):
47.691
State:
Illinois

Rockbridge township is located in Greene County, Illinois. Rockbridge township has a 2026 population of 1,451. Rockbridge township is currently declining at a rate of -1.29% annually and its population has decreased by -6.75% since the most recent census, which recorded a population of 1,556 in 2020.

The median household income in Rockbridge township is $76,731 with a poverty rate of 8.85%. The median age in Rockbridge township is 39.2 years: 39.2 years for males, and 39.2 years for females. For every 100 females there are 84.0 males.

1.5K
Total Population
30
Density (mi²)
-19 -1.29%
Growth

Rockbridge township Population

Rockbridge township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,451-19-1.29%
20251,470-19-1.28%
20241,489-19-1.26%
20231,508-9-0.59%
20221,517-25-1.62%
20211,542-14-0.9%
20201,556-6-0.38%
20191,503-18-1.18%
20181,521-14-0.91%
20171,53560.39%
20161,529-35-2.24%
20151,564-13-0.82%
20141,577-25-1.56%
20131,602-2-0.12%
20121,604-26-1.6%
20111,630-3-0.18%
20101,63410.06%

Median Age

Overall: 39.2 years
Female: 39.2 years
Male: 39.2 years

Rockbridge township Adults

There are 1,156 adults, (233 of whom are seniors) in Rockbridge township.

Sex Ratio

Female: 854 (54.4%)
Male: 717 (45.6%)

Demographics

The racial composition of Rockbridge township includes 91.41% White, and smaller percentages for Black or African American, Native American, other race and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White1,43691.41%
Two or more races885.6%
Black or African American412.61%
Native American30.19%
Other race30.19%
Race
Population ↓
Percentage (of total)
Two or more races623.95%
Other race30.19%
Race
Population ↓
Percentage (of total)
White1,43691.41%
Black or African American412.61%
Two or more races261.65%
Native American30.19%

Rockbridge township Marital Status

Economics and Income Statistics

Rockbridge township 's average per capita income is $46,303. Household income levels show a median of $76,731. The poverty rate stands at 8.85%.

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$106,250-
Families$78,393$101,320
Households$76,731$92,425
Non Families$57,500$55,390

$46,303

Average Income

$76,731

Median Household Income

8.85%

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)