Mercer, Wisconsin Demographics & Population 2026

A note before these figures: with a population of 365, Mercer'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

Mercer is a small community located in Wisconsin, within Iron County. The total population is 365. It ranks as the 594th most populous out of 808 Census-designated places in Wisconsin.

Age Demographics

The median age in Mercer is 61.7 years. This is 53% higher than the state median of 40.2 years. Only 7.1% of residents are under 18, indicating fewer families with children. 15.6% 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 Mercer is $37,917. This is 51% lower than the state median of $77,485. It is also 53% lower than the national median of $80,734. The poverty rate stands at 17.8%. This is 69% higher than the state poverty rate of 10.5%. The survey records no unemployed residents in Mercer, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $212,500. Housing costs are 20% lower than the state median of $266,500. The home-value-to-income ratio is 5.6x. 71.8% of occupied housing units are owner-occupied. This homeownership rate is 6% higher than the state average of 67.8%.

Race & Ethnicity

Mercer has a predominantly White (non-Hispanic) population, comprising 97.8% of all residents. Hispanic or Latino residents account for 2.2%. The Hispanic or Latino population (2.2%) is well below the state average of 8.0%.

Education

17.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 48% lower than the state rate of 33.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 90.6%.

Data Sources & Methodology

All demographic data for Mercer, 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.