South Rock Island township Flag

South Rock Island township

County Seat:
No
Area (mi²):
6.894
State:
Illinois

South Rock Island township is located in Rock Island County, Illinois. South Rock Island township has a 2026 population of 18,264. South Rock Island township is currently growing at a rate of 0.41% annually but its population has decreased by -0.79% since the most recent census, which recorded a population of 18,410 in 2020.

The median household income in South Rock Island township is $69,711 with a poverty rate of 12.38%. The median age in South Rock Island township is 43.2 years: 40.4 years for males, and 46.7 years for females. For every 100 females there are 97.6 males.

18.3K
Total Population
2,649
Density (mi²)
75 0.41%
Growth

South Rock Island township Population

South Rock Island township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202618,264750.41%
202518,189750.41%
202418,114750.42%
202318,039-12-0.07%
202218,051-145-0.8%
202118,196-214-1.16%
202018,410-47-0.25%
201917,464-128-0.73%
201817,592-202-1.14%
201717,794-177-0.98%
201617,971-182-1%
201518,153-114-0.62%
201418,267-46-0.25%
201318,313-20-0.11%
201218,333-19-0.1%
201118,352-55-0.3%
201018,362-2-0.01%

Median Age

Overall: 43.2 years
Female: 46.7 years
Male: 40.4 years

South Rock Island township Adults

There are 14,477 adults, (4,099 of whom are seniors) in South Rock Island township.

Sex Ratio

Female: 9,192 (50.6%)
Male: 8,968 (49.4%)

Demographics

The racial composition of South Rock Island township includes 72.27% White, 11.96% Black or African American, 5.22% Asian, and smaller percentages for other race, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White13,12572.27%
Black or African American2,17211.96%
Two or more races1,3297.32%
Asian9485.22%
Other race5332.94%
Native American530.29%
Race
Population ↓
Percentage (of total)
Two or more races7844.32%
Other race5002.75%
White3061.69%
Native American360.2%
Black or African American90.05%
Race
Population ↓
Percentage (of total)
White12,81970.59%
Black or African American2,16311.91%
Asian9485.22%
Two or more races5453%
Other race330.18%
Native American170.09%

South Rock Island township Marital Status

Economics and Income Statistics

South Rock Island township 's average per capita income is $49,407. Household income levels show a median of $69,711. The poverty rate stands at 12.38%.

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$108,083-
Families$84,720$114,873
Households$69,711$88,439
Non Families$42,212$53,884

$49,407

Average Income

$69,711

Median Household Income

12.38%

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)