Alto, Wisconsin Demographics & Population 2026

A note before these figures: with a population of 122, Alto'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

Alto is a small community located in Wisconsin, within Fond du Lac County. The total population is 122. It ranks as the 747th most populous out of 808 Census-designated places in Wisconsin.

Age Demographics

The median age in Alto is 43.5 years. This is 8% higher than the state median of 40.2 years. Only 13.1% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in Alto is $86,667. This is 12% higher than the state median of $77,485. It is also 7% higher than the national median of $80,734. The poverty rate stands at 1.7%. This is 84% lower than the state poverty rate of 10.5%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Alto, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $169,600. Housing costs are 36% lower than the state median of $266,500. With a home-value-to-income ratio of just 2.0x, Alto is one of the most affordable housing markets in the area. 83.3% of occupied housing units are owner-occupied. This homeownership rate is 23% higher than the state average of 67.8%.

Race & Ethnicity

Every resident counted in Alto was recorded as White (non-Hispanic). A figure of exactly 100.0% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.

Education

16.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 51% 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 93.8%.

Data Sources & Methodology

All demographic data for Alto, 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.