Salem is located in Marion County, Illinois. Salem has a 2025 population of 923 . It is also the county seat of Marion County . Salem is currently growing at a rate of 0.11% annually but its population has decreased by -2.12% since the most recent census, which recorded a population of 943 in 2020.
The average household income in Salem is $79,300 with a poverty rate of 4.04%. The median age in Salem is 46.4 years: 42.6 years for males, and 47.7 years for females. For every 100 females there are 135.6 males.
Data after 2023 is projected based on recent change
The racial composition of Salem includes 94.28% White, and smaller percentages for Black or African American, Two or more races, other race, Asian and multiracial populations.
White (94.28%)
Black or African American (2.52%)
Two or more races (1.72%)
Other race (0.8%)
Asian (0.69%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 824 | 94.28% |
| Black or African American | 22 | 2.52% |
| Two or more races | 15 | 1.72% |
| Other race | 7 | 0.8% |
| Asian | 6 | 0.69% |
Married
Widowed
Divorced
Separated
Never Married
Salem's average per capita income is $37,583. Household income levels show a median of $67,344. The poverty rate stands at 4.04%.
Name | Median | Mean |
|---|---|---|
| Married Families | $92,083 | - |
| Families | $83,750 | $102,123 |
| Households | $67,344 | $79,300 |
| Non Families | $29,911 | $38,395 |
Average Income
Median Household Income
Poverty Rate