St. Louis city, Michigan Demographics & Population 2026

Population Overview

St. Louis city is a small city located in Michigan, within Gratiot County. The total population is 6,926. It ranks as the 143rd most populous out of 745 cities and towns in Michigan.

Age Demographics

The median age in St. Louis city is 38.8 years. This is 3% lower than the state median of 40.1 years. Only 10.7% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in St. Louis city is $46,096. This is 35% lower than the state median of $71,149. Compared to the national median of $78,538, household income here is 41% lower. The poverty rate stands at 15.4%. This is 18% higher than the state poverty rate of 13.1%. The unemployment rate is 5.0%. This is 15% lower than the state rate of 5.8%. The median home value is $115,700. Housing costs are 47% lower than the state median of $217,600. With a home-value-to-income ratio of just 2.5x, St. Louis city is one of the most affordable housing markets in the area. 68.6% of occupied housing units are owner-occupied. This homeownership rate is 6% lower than the state average of 72.9%.

Race & Ethnicity

The largest racial or ethnic group in St. Louis city is White (non-Hispanic), making up 59.3% of the population. Black or African American residents account for 25.4%. The Black or African American population is significantly higher than the state average (25.4% vs 13.2%). The Hispanic or Latino population is significantly higher than the state average (10.7% vs 5.7%). The Asian population (0.4%) is well below the state average of 3.3%.

Education

6.8% 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 78% lower than the state rate of 31.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 87.1%.

Data Sources & Methodology

All demographic data for St. Louis city, Michigan is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Michigan state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 745 Census-designated places in Michigan. For official data, visit data.census.gov.