Marquette Heights, Illinois Demographics & Population 2026

Population Overview

Marquette Heights is a small community located in Illinois, within Tazewell County. The total population is 2,492. It ranks as the 460th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Marquette Heights is 37.7 years. This is 3% lower than the state median of 39.0 years.

Economy, Income & Housing

The median household income in Marquette Heights is $75,625. This is 9% lower than the state median of $83,390. It is also 6% lower than the national median of $80,734. The poverty rate stands at 3.7%. This is 69% lower than the state poverty rate of 11.8%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 1.3%. This is 77% lower than the state rate of 5.8%. The median home value is $123,800. Housing costs are 53% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.6x, Marquette Heights is one of the most affordable housing markets in the area. 92.3% of occupied housing units are owner-occupied. This homeownership rate is 38% higher than the state average of 67.1%.

Race & Ethnicity

Marquette Heights has a predominantly White (non-Hispanic) population, comprising 89.3% of all residents. Hispanic or Latino residents account for 8.4%. The White (non-Hispanic) population is significantly higher than the state average (89.3% vs 58.1%). The Black or African American population (0.1%) is well below the state average of 13.3%. The Hispanic or Latino population (8.4%) is well below the state average of 18.8%.

Education

25.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 33% 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 93.3%.

Data Sources & Methodology

All demographic data for Marquette Heights, 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.