Grand Marsh, Wisconsin Demographics & Population 2026

A note before these figures: with a population of 141, Grand Marsh'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

Grand Marsh is a small community located in Wisconsin, within Adams County. The total population is 141. It ranks as the 730th most populous out of 808 Census-designated places in Wisconsin.

Age Demographics

The median age in Grand Marsh is 60.4 years. This is 50% higher than the state median of 40.2 years. 12.1% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Grand Marsh is $31,731. This is 59% lower than the state median of $77,485. It is also 61% lower than the national median of $80,734. The poverty rate stands at 20.6%. This is 95% higher than the state poverty rate of 10.5%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in Grand Marsh, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $89,400. Housing costs are 66% lower than the state median of $266,500. With a home-value-to-income ratio of just 2.8x, Grand Marsh is one of the most affordable housing markets in the area. 95.5% of occupied housing units are owner-occupied. This homeownership rate is 41% higher than the state average of 67.8%.

Race & Ethnicity

The largest racial or ethnic group in Grand Marsh is White (non-Hispanic), making up 70.2% of the population. Hispanic or Latino residents account for 29.8%. The Hispanic or Latino population is significantly higher than the state average (29.8% vs 8.0%).

Education

0.0% 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. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 60.3%.

Data Sources & Methodology

All demographic data for Grand Marsh, Wisconsin 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 Wisconsin state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 808 Census-designated places in Wisconsin. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.