Hillsboro Flag

Hillsboro

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

Hillsboro is a city located in Montgomery County, Illinois. Hillsboro has a 2026 population of 5,711. It is also the county seat of Montgomery County. Hillsboro is currently declining at a rate of -0.44% annually and its population has decreased by -2.56% since the most recent census, which recorded a population of 5,861 in 2020.

The median household income in Hillsboro is $50,158 with a poverty rate of 11.64%. The median age in Hillsboro is 40.4 years: 38.2 years for males, and 49.8 years for females. For every 100 females there are 204.3 males.

5.7K
Total Population
662
Density (mi²)
-25 -0.44%
Growth

Hillsboro Population

Hillsboro Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20265,711-25-0.44%
20255,736-25-0.43%
20245,761-22-0.38%
20235,783-31-0.53%
20225,814-26-0.45%
20215,840-21-0.36%
20205,861-10-0.17%
20195,964-48-0.8%
20186,012-14-0.23%
20176,026-40-0.66%
20166,066-4-0.07%
20156,070-87-1.41%
20146,1573345.74%
20135,823-221-3.66%
20126,044-134-2.17%
20116,178-31-0.5%
20106,20920.03%
20004,359-41-0.93%
19904,400-8-0.18%
19804,4081413.3%
19704,267350.83%
19604,232912.2%
19504,141-373-8.26%
19404,514791.78%
19304,435-639-12.59%
19205,0741,65048.19%
19103,42400%

Median Age

Overall: 40.4 years
Female: 49.8 years
Male: 38.2 years

Hillsboro Adults

There are 4,946 adults, (862 of whom are seniors) in Hillsboro.

Sex Ratio

Female: 1,907 (32.9%)
Male: 3,896 (67.1%)

Demographics

The racial composition of Hillsboro includes 79.1% White, 12.73% Black or African American, and smaller percentages for other race, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White4,59079.1%
Black or African American73912.73%
Two or more races3395.84%
Other race1071.84%
Asian240.41%
Native Hawaiian or Pacific Islander40.07%
Race
Population ↓
Percentage (of total)
Two or more races1452.5%
White1202.07%
Other race631.09%
Black or African American40.07%
Race
Population ↓
Percentage (of total)
White4,47077.03%
Black or African American73512.67%
Two or more races1943.34%
Other race440.76%
Asian240.41%
Native Hawaiian or Pacific Islander40.07%

Hillsboro Marital Status

Economics and Income Statistics

Hillsboro 's average per capita income is $41,192. Household income levels show a median of $50,158. The poverty rate stands at 11.64%.

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$92,284-
Families$88,606$108,407
Households$50,158$74,467
Non Families$32,852$34,167

$41,192

Average Income

$50,158

Median Household Income

11.64%

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)