Northfield township Flag

Northfield township

County:
Cook County
County Seat:
No
Area (mi²):
34.285
State:
Illinois

Northfield township is located in Cook County, Illinois. Northfield township has a 2026 population of 90,820. Northfield township is currently growing at a rate of 0.73% annually but its population has decreased by -0.5% since the most recent census, which recorded a population of 91,275 in 2020.

The median household income in Northfield township is $136,617 with a poverty rate of 7.11%. The median age in Northfield township is 47.3 years: 45.8 years for males, and 48.9 years for females. For every 100 females there are 90.3 males.

90.8K
Total Population
2,649
Density (mi²)
658 0.73%
Growth

Northfield township Population

Northfield township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202690,8206580.73%
202590,1626580.74%
202489,5046580.74%
202388,846-56-0.06%
202288,902-925-1.03%
202189,827-1,448-1.59%
202091,275-299-0.33%
201986,511-186-0.21%
201886,697-672-0.77%
201787,369-410-0.47%
201687,779-97-0.11%
201587,8764060.46%
201487,4701,0991.27%
201386,3714850.56%
201285,8863410.4%
201185,5454430.52%
201085,172870.1%

Median Age

Overall: 47.3 years
Female: 48.9 years
Male: 45.8 years

Northfield township Adults

There are 68,990 adults, (22,968 of whom are seniors) in Northfield township.

Sex Ratio

Female: 47,119 (52.5%)
Male: 42,555 (47.5%)

Demographics

The racial composition of Northfield township includes 70.91% White, 18.17% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White63,58870.91%
Asian16,29618.17%
Two or more races5,9536.64%
Other race2,0842.32%
Black or African American1,6291.82%
Native American990.11%
Native Hawaiian or Pacific Islander250.03%
Race
Population ↓
Percentage (of total)
Two or more races2,5182.81%
White1,7641.97%
Other race1,3271.48%
Native American870.1%
Asian390.04%
Black or African American150.02%
Race
Population ↓
Percentage (of total)
White61,82468.94%
Asian16,25718.13%
Two or more races3,4353.83%
Black or African American1,6141.8%
Other race7570.84%
Native Hawaiian or Pacific Islander250.03%
Native American120.01%

Northfield township Marital Status

Economics and Income Statistics

Northfield township 's average per capita income is $85,401. Household income levels show a median of $136,617. The poverty rate stands at 7.11%.

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$210,294-
Families$188,258$252,454
Households$136,617$207,460
Non Families$61,171$90,891

$85,401

Average Income

$136,617

Median Household Income

7.11%

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)