Montgomery County, Illinois
Located in Illinois, Montgomery County has a population of 27,942 residents and a median age of 42.8 years, making it the #1,544 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 12.6%. The median home value is $112,300, and the median household income is $63,620, which is 15% below the national median.
Demographics
Montgomery County has a population of 27,942, making it the #1,544 most populous county in the US. The median age is 42.8 years, which is 10.0% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Montgomery County is $63,620, ranking #1,741 out of 3,222 counties — 15.3% below the national median. The poverty rate is 12.6% and unemployment stands at 4.7%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Montgomery County is $112,300 (-60.2% vs national). Renters pay a median of $723/mo and the homeownership rate is 77.4%.
Median Home Value Trend
Rankings →Household Type
Education
In Montgomery County, 18.3% of adults age 25+ hold a bachelor's degree or higher, which is 45.7% below the national average, ranking #2,303 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Montgomery County is 74.1 years. 19.2% of adults report poor or fair health and 6.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
19.1% of adults in Montgomery County smoke , 36.2% are obese , and 22.3% report excessive drinking. The drug overdose death rate is 39.2 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 19.4 per 100,000. Motor vehicle deaths occur at a rate of 17.6 per 100,000.
Suicide Rate Trend
Families & Children
18.2% of children in Montgomery County live in poverty and the infant mortality rate is 9.9 per 1,000 live births. The teen birth rate is 23.2 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Montgomery County is 60.4%. The mean commute time is 25.2 min, which is 8.6% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Montgomery County voted Republican with a margin of 44.0%. The vote was 27.1% Dem / 71.1% Rep. Compared to 2020, the margin shifted 3.0 toward Republicans .
Vote Share Over Time
About Montgomery County, Illinois
Montgomery County, Illinois has a total population of 27,942, making it the 1,544th most populous county in the United States. The median age in Montgomery County is 42.8 years, which is 10.0% above the national median of 38.9 years.
The median household income in Montgomery County is $63,620, which ranks #1,741 of 3,222 counties nationwide. This is 15.3% below the national median of $75,149. The poverty rate is 12.6%, higher than the national rate of 12.6%. The unemployment rate stands at 4.7%.
The median home value in Montgomery County is $112,300, 60.2% below the national median. Renters in Montgomery County pay a median gross rent of $723 per month. The homeownership rate is 77.4%, compared to the national rate of 64.4%.
In Montgomery County, 18.3% of residents aged 25 and older hold a bachelor's degree or higher, 45.7% below the national average of 33.7%. Health insurance coverage stands at 95.5% of the population. The average commute time for workers is 25.2 min.
Montgomery County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 91.7% of the population, followed by Black (non-Hispanic) (3.3%) and Hispanic or Latino (2.2%).
All data for Montgomery County, Illinois comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.