Rockham, South Dakota Demographics & Population 2026

A note before these figures: with a population of 37, Rockham'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

Rockham is a small community located in South Dakota, within Faulk County. The total population is 37. It ranks as the 388th most populous out of 439 Census-designated places in South Dakota.

Age Demographics

The median age in Rockham is 40.2 years. This is 6% higher than the state median of 38.0 years. With 37.8% of the population under 18, Rockham has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Rockham is $137,083. This is 83% higher than the state median of $75,081. It is also 70% higher than the national median of $80,734. The ACS records no residents below the poverty line in Rockham. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The unemployment rate is 6.3%. This is 113% higher than the state rate of 2.9%. The median home value is $88,300. Housing costs are 66% lower than the state median of $257,400. With a home-value-to-income ratio of just 0.6x, Rockham is one of the most affordable housing markets in the area. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 46% higher than the state average of 68.6%.

Race & Ethnicity

Rockham has a predominantly White (non-Hispanic) population, comprising 94.6% of all residents.

Education

30.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 5% lower than the state rate of 31.9%. 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 Rockham, 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.