Monticello Flag

Monticello

County:
Piatt County
County Seat:
Yes
Area (mi²):
47.998
State:
Illinois

Monticello is located in Piatt County, Illinois. Monticello has a 2025 population of 6,147 . It is also the county seat of Piatt County . Monticello is currently declining at a rate of -0.23% annually but its population has increased by 0.69% since the most recent census, which recorded a population of 6,105 in 2020.

The average household income in Monticello is $100,449 with a poverty rate of 5.83%. The median age in Monticello is 44.9 years: 42.9 years for males, and 47.2 years for females. For every 100 females there are 92.2 males.

6.1K
Total Population
128
Density (mi²)
-14 -0.23%
Growth

Monticello Population

Monticello Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Monticello includes 97.26% White, and smaller percentages for Two or more races, Black or African American, Asian and multiracial populations.

Population by Race

White (97.26%)

Two or more races (1.68%)

Black or African American (0.69%)

Asian (0.38%)

Race
Population
Percentage (of total)
White5,95897.26%
Two or more races1031.68%
Black or African American420.69%
Asian230.38%

Monticello Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Monticello's average per capita income is $53,585. Household income levels show a median of $92,947. The poverty rate stands at 5.83%.

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$106,823-
Families$98,377$111,666
Households$92,947$100,449
Non Families$58,030$60,249

$53,585

Average Income

$92,947

Median Household Income

5.83%

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)