Old Mill Creek

County:: Lake County
County Seat:: No
Area (mi²):: 10.664
State:: Illinois

Old Mill Creek is a village located in Lake County, Illinois. Old Mill Creek has a 2025 population of 160. Old Mill Creek is currently declining at a rate of -0.62% annually and its population has decreased by -2.44% since the most recent census, which recorded a population of 164 in 2020.

The average household income in Old Mill Creek is $114,170 with a poverty rate of 6.11%. The median age in Old Mill Creek is 42.9 years: 40.8 years for males, and 45 years for females.

Demographics

The racial composition of Old Mill Creek includes 86.26% White, 10.69% other race, and smaller percentages for Two or more races, Native American, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Other race

Two or more races

Native American

Black or African American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	113	86.26%
Other race	14	10.69%
Two or more races	3	2.29%
Native American	1	0.76%
Black or African American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

Old Mill Creek Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Old Mill Creek's average per capita income is $48,333. Household income levels show a median of $71,875. The poverty rate stands at 6.11%.

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
Families	$111,667	$150,532
Married Families	$111,667	-
Households	$71,875	$114,170
Non Families	$40,000	$54,600

$48,333

Average Income

$71,875

Median Household Income

6.11%

Poverty Rate