Waltham, Minnesota Demographics & Population 2026

A note before these figures: with a population of 182, Waltham'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

Waltham is a small community located in Minnesota, within Mower County. The total population is 182. It ranks as the 710th most populous out of 914 Census-designated places in Minnesota.

Age Demographics

The median age in Waltham is 34.7 years. This is 11% lower than the state median of 38.8 years. With 37.4% of the population under 18, Waltham has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Waltham is $69,167. This is 22% lower than the state median of $89,062. It is also 14% lower than the national median of $80,734. The poverty rate stands at 10.4%. This is 12% higher than the state poverty rate of 9.3%. The unemployment rate is 10.3%. This is 154% higher than the state rate of 4.1%. The median home value is $95,000. Housing costs are 71% lower than the state median of $329,300. With a home-value-to-income ratio of just 1.4x, Waltham is one of the most affordable housing markets in the area. 81.8% of occupied housing units are owner-occupied. This homeownership rate is 13% higher than the state average of 72.2%.

Race & Ethnicity

The largest racial or ethnic group in Waltham is White (non-Hispanic), making up 81.9% of the population. Hispanic or Latino residents account for 18.1%. The Hispanic or Latino population is significantly higher than the state average (18.1% vs 6.4%).

Education

2.7% 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 93% 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 86.6%.

Data Sources & Methodology

All demographic data for Waltham, 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.