Hillsboro Flag

Hillsboro

County Seat:
Yes
Area (mi²):
8.628
State:
Illinois

Hillsboro is a city located in Montgomery County, Illinois. Hillsboro has a 2025 population of 5,736 . It is also the county seat of Montgomery County . Hillsboro is currently declining at a rate of -0.43% annually and its population has decreased by -2.13% since the most recent census, which recorded a population of 5,861 in 2020.

The average household income in Hillsboro is $69,067 with a poverty rate of 15.75%. The median age in Hillsboro is 41 years: 37.9 years for males, and 53.7 years for females. For every 100 females there are 207.7 males.

5.7K
Total Population
665
Density (mi²)
-25 -0.43%
Growth

Hillsboro Population

Hillsboro Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Hillsboro includes 82.58% White, 11.68% Black or African American, and smaller percentages for other race, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White (82.58%)

Black or African American (11.68%)

Two or more races (3.97%)

Other race (1.67%)

Native Hawaiian or Pacific Islander (0.11%)

Race
Population
Percentage (of total)
White4,70182.58%
Black or African American66511.68%
Two or more races2263.97%
Other race951.67%
Native Hawaiian or Pacific Islander60.11%

Hillsboro Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Hillsboro's average per capita income is $39,390. Household income levels show a median of $48,158. The poverty rate stands at 15.75%.

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$108,750-
Families$95,417$107,044
Households$48,158$69,067
Non Families$25,833$32,562

$39,390

Average Income

$48,158

Median Household Income

15.75%

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)