Mercer is located in Mercer County, Illinois. Mercer has a 2025 population of 3,870. Mercer is currently declining at a rate of -0.44% annually and its population has decreased by -2.17% since the most recent census, which recorded a population of 3,956 in 2020.
The average household income in Mercer is $79,472 with a poverty rate of 10.19%.The median age in Mercer is 42.3 years: 39 years for males, and 42.7 years for females.
Data after 2023 is projected based on recent change
The racial composition of Mercer includes 95.77% White, and smaller percentages for Two or more races, Black or African American, other race, Native American and multiracial populations.
White (95.8%)
Two or more races (2.0%)
Black or African American (1.9%)
Other race (0.3%)
Native American (0.0%)
Race | Population | Percentage (of total) |
---|---|---|
White | 3,779 | 95.77% |
Two or more races | 80 | 2.03% |
Black or African American | 74 | 1.88% |
Other race | 12 | 0.3% |
Native American | 1 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
Mercer's average per capita income is $45,406. Household income levels show a median of $62,462. The poverty rate stands at 10.19%.
Name | Median | Mean |
---|---|---|
Married Families | $96,797 | - |
Families | $93,083 | $98,287 |
Households | $62,462 | $79,472 |
Non Families | $34,219 | $42,141 |
Average Income
Median Household Income
Poverty Rate