Monticello Flag

Monticello

County:
Piatt County
County Seat:
Yes
Area (mi²):
3.878
State:
Illinois

Monticello is a city located in Piatt County, Illinois. Monticello has a 2025 population of 6,063. It is also the county seat of Piatt County. Monticello is currently growing at a rate of 0.38% annually and its population has increased by 1.9% since the most recent census, which recorded a population of 5,950 in 2020.

The average household income in Monticello is $99,532 with a poverty rate of 6.14%.The median age in Monticello is 42.9 years: 40.7 years for males, and 45.9 years for females.

6.1K
Total Population
1,563
Density (mi²)
23 0.38%
Growth

Monticello Population

Monticello Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Monticello includes 94.74% White, 3.27% Black or African American, and smaller percentages for Two or more races, Asian and multiracial populations.

Population by Race

White (94.7%)

Black or African American (3.3%)

Two or more races (1.6%)

Asian (0.4%)

Race
Population
Percentage (of total)
White5,99994.74%
Black or African American2073.27%
Two or more races1031.63%
Asian230.36%

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 $53,808. Household income levels show a median of $88,611. The poverty rate stands at 6.14%.

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$106,276-
Families$97,807$112,924
Households$88,611$99,532
Non Families$56,786$57,700

$53,808

Average Income

$88,611

Median Household Income

6.14%

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)