Iron Mountain Lake, Missouri Demographics & Population 2026

A note before these figures: with a population of 781, Iron Mountain Lake'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

Iron Mountain Lake is a small community located in Missouri, within St. Francois County. The total population is 781. It ranks as the 424th most populous out of 1,062 Census-designated places in Missouri.

Age Demographics

The median age in Iron Mountain Lake is 49.2 years. This is 26% higher than the state median of 39.0 years.

Economy, Income & Housing

The median household income in Iron Mountain Lake is $30,682. This is 57% lower than the state median of $70,702. It is also 62% lower than the national median of $80,734. The poverty rate stands at 24.7%. This is 96% higher than the state poverty rate of 12.6%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 1.1%. This is 73% lower than the state rate of 4.0%. The median home value is $38,600. Housing costs are 83% lower than the state median of $230,300. With a home-value-to-income ratio of just 1.3x, Iron Mountain Lake is one of the most affordable housing markets in the area. 83.6% of occupied housing units are owner-occupied. This homeownership rate is 23% higher than the state average of 68.1%.

Race & Ethnicity

Iron Mountain Lake has a predominantly White (non-Hispanic) population, comprising 96.5% of all residents. Hispanic or Latino residents account for 0.5%. The Black or African American population (0.1%) is well below the state average of 10.9%. The Hispanic or Latino population (0.5%) is well below the state average of 5.2%.

Education

3.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 90% lower than the state rate of 32.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 65.3%.

Data Sources & Methodology

All demographic data for Iron Mountain Lake, Missouri 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 Missouri state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,062 Census-designated places in Missouri. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.