Rochester township Flag

Rochester township

County:
Sangamon County
County Seat:
No
Area (mi²):
33.365
State:
Illinois

Rochester township is located in Sangamon County, Illinois. Rochester township has a 2026 population of 5,918. Rochester township is currently growing at a rate of 2.14% annually and its population has increased by 7.35% since the most recent census, which recorded a population of 5,513 in 2020.

The median household income in Rochester township is $114,551 with a poverty rate of 1.99%. The median age in Rochester township is 41.6 years: 38.9 years for males, and 44.4 years for females. For every 100 females there are 102.0 males.

5.9K
Total Population
177
Density (mi²)
124 2.14%
Growth

Rochester township Population

Rochester township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20265,9181242.14%
20255,7941242.19%
20245,6701242.24%
20235,546581.06%
20225,488-15-0.27%
20215,503-10-0.18%
20205,513-4-0.07%
20195,273-27-0.51%
20185,300-32-0.6%
20175,332-25-0.47%
20165,357-25-0.46%
20155,382-3-0.06%
20145,38520.04%
20135,383-8-0.15%
20125,391210.39%
20115,37090.17%
20105,319150.28%

Median Age

Overall: 41.6 years
Female: 44.4 years
Male: 38.9 years

Rochester township Adults

There are 4,212 adults, (1,121 of whom are seniors) in Rochester township.

Sex Ratio

Female: 2,741 (49.5%)
Male: 2,797 (50.5%)

Demographics

The racial composition of Rochester township includes 93.79% White, and smaller percentages for Asian, Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White5,19493.79%
Two or more races1923.47%
Asian781.41%
Black or African American741.34%
Race
Population ↓
Percentage (of total)
White240.43%
Two or more races140.25%
Race
Population ↓
Percentage (of total)
White5,17093.36%
Two or more races1783.21%
Asian781.41%
Black or African American741.34%

Rochester township Marital Status

Economics and Income Statistics

Rochester township 's average per capita income is $59,885. Household income levels show a median of $114,551. The poverty rate stands at 1.99%.

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$126,775-
Families$125,812$138,764
Households$114,551$132,361
Non Families$73,889$114,374

$59,885

Average Income

$114,551

Median Household Income

1.99%

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)