Heidelberg, Minnesota Demographics & Population 2026

A note before these figures: with a population of 235, Heidelberg'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

Heidelberg is a small community located in Minnesota, within Le Sueur County. The total population is 235. It ranks as the 663rd most populous out of 914 Census-designated places in Minnesota.

Age Demographics

The median age in Heidelberg is 39.3 years. This is 1% higher than the state median of 38.8 years. With 34.5% of the population under 18, Heidelberg has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Heidelberg is $115,417. This is 30% higher than the state median of $89,062. It is also 43% higher than the national median of $80,734. The poverty rate stands at 0.4%. This is 95% lower than the state poverty rate of 9.3%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 6.7%. This is 66% higher than the state rate of 4.1%. The median home value is $316,700. Housing costs are 4% lower than the state median of $329,300. With a home-value-to-income ratio of just 2.7x, Heidelberg is one of the most affordable housing markets in the area. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 38% higher than the state average of 72.2%.

Race & Ethnicity

Every resident counted in Heidelberg was recorded as White (non-Hispanic). A figure of exactly 99.2% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.

Education

35.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 10% lower than the state rate of 39.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.2%.

Data Sources & Methodology

All demographic data for Heidelberg, Minnesota 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 Minnesota state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 914 Census-designated places in Minnesota. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.