Mound City, Illinois Demographics & Population 2026

A note before these figures: with a population of 681, Mound City's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Mound City is a small community located in Illinois, within Pulaski County. The total population is 681. It ranks as the 829th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Mound City is 37.4 years. This is 4% lower than the state median of 39.0 years. With 28.9% of the population under 18, Mound City has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Mound City is $41,250. This is 51% lower than the state median of $83,390. It is also 49% lower than the national median of $80,734. The poverty rate stands at 16.4%. This is 39% higher than the state poverty rate of 11.8%. The unemployment rate is 12.1%. This is 108% higher than the state rate of 5.8%. The median home value is $55,600. Housing costs are 79% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.3x, Mound City is one of the most affordable housing markets in the area. 42.1% of occupied housing units are owner-occupied. This homeownership rate is 37% lower than the state average of 67.1%.

Race & Ethnicity

The largest racial or ethnic group in Mound City is White (non-Hispanic), making up 52.3% of the population. Black or African American residents account for 45.5%. The Black or African American population is significantly higher than the state average (45.5% vs 13.3%). The Asian population (0.3%) is well below the state average of 5.9%.

Education

0.7% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 98% lower than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.4%.

Data Sources & Methodology

All demographic data for Mound City, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.