Nisland, South Dakota Demographics & Population 2026

A note before these figures: with a population of 109, Nisland'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

Nisland is a small community located in South Dakota, within Butte County. The total population is 109. It ranks as the 292nd most populous out of 439 Census-designated places in South Dakota.

Age Demographics

The median age in Nisland is 39.8 years. This is 5% higher than the state median of 38.0 years. With 38.5% of the population under 18, Nisland has a notably young demographic profile, suggesting a family-oriented community. 13.8% 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 Nisland is $26,979. This is 64% lower than the state median of $75,081. It is also 67% lower than the national median of $80,734. The poverty rate stands at 12.8%. This is 8% higher than the state poverty rate of 11.9%. The survey records no unemployed residents in Nisland, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $87,100. Housing costs are 66% lower than the state median of $257,400. The home-value-to-income ratio is 3.2x. 80.8% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 68.6%.

Race & Ethnicity

The largest racial or ethnic group in Nisland is White (non-Hispanic), making up 56.9% of the population. Hispanic or Latino residents account for 6.4%.

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. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.

Data Sources & Methodology

All demographic data for Nisland, South Dakota 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 South Dakota state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 439 Census-designated places in South Dakota. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.